1
|
Shaner JT, Harrell RM, Jacobs JM, Yonkos LT, Townsend H. Modeling the importance of fish condition, overall health, and disease on the fecundity of White Perch in the Choptank River. JOURNAL OF AQUATIC ANIMAL HEALTH 2023; 35:154-168. [PMID: 37596800 DOI: 10.1002/aah.10186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 03/01/2023] [Accepted: 03/20/2023] [Indexed: 08/20/2023]
Abstract
OBJECTIVE Modeling of fecundity with allometric, nutritional, and environmental covariates has increased sensitivity of reproductive metrics in many fish species. In estuaries with heavy anthropogenic influence, resident species often experience sublethal health impacts because of increased stress, which can include increases in gonadal pathology, intersex, or potential reproductive failure. This study models the fecundity of the estuarine species White Perch Morone americana in response to health parameters identified as signals of habitat stress, including gross pathology presentation, nutritional condition, and disease presence. METHODS Subpopulation fecundity in the Choptank River (Maryland) of the Chesapeake Bay was estimated using stereological fecundity sampling methods and modeled using information-theoretic approaches of model selection. Nutritional and health parameters identified through health assessment techniques, specific somatic indices, and disease presence were selected as covariates. RESULT Nutrition demonstrated limited influence on model fit as compared to models with only conventional allometric variables such as weight and length. Of the health variables, gross pathology and somatic indices showed minimal influence on selection, but mycobacterial infection, a chronic condition in the Chesapeake Bay among temperate basses, showed measurable influence. Models with mycobacteriosis included were 40 times more likely the best fit when compared to models with only allometric parameters. CONCLUSION Whether this has a region-wide influence on all subpopulations will require further research and sampling of the magnitude of mycobacteriosis infection.
Collapse
Affiliation(s)
- Jacob T Shaner
- Maryland Department of Natural Resources, Cooperative Oxford Laboratory, Oxford, Maryland, USA
| | - Reginal M Harrell
- Department of Environmental Science and Technology, University of Maryland, College Park, Maryland, USA
| | - John M Jacobs
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Cooperative Oxford Laboratory, Oxford, Maryland, USA
| | - Lance T Yonkos
- Department of Environmental Science and Technology, University of Maryland, College Park, Maryland, USA
| | - Howard Townsend
- National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Office of Science and Technology, Silver Spring, Maryland, USA
| |
Collapse
|
2
|
Salas-Singh C, Morales-Bojórquez E, Aguirre-Villaseñor H. Reproductive biology of the bullseye puffer Sphoeroides annulatus: Gonadosomatic index and its suitability for estimating length at maturity. JOURNAL OF FISH BIOLOGY 2022; 101:1119-1133. [PMID: 35869632 DOI: 10.1111/jfb.15174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
This study aimed to describe updated information on the basic reproductive biology of Sphoeroides annulatus females and potential use of the gonadosomatic index I G as input data to assess length at 50% maturity ( L 50 ) and identify the breeding season. From April 2014 to December 2015, 767 females were analysed along the north-west coast of the Mexican Pacific Ocean. Both immature and mature females were represented in the total length ( L T ), which ranged from 81 to 440 mm, and the smallest mature female was 92 mm (new record for the species). Gonadal maturity phases were assigned through histological analysis. A I G threshold value I cut was established using the lower whisker value for maturity phase spawning capable (2.06%). The monthly variation of I G supported the annual spawning seasonality, and the presence of reproductively active mature females I G ≥ I cut coincided with the observed periods with histological data and the peaks for both seasons 2014 and 2015. Also the presence of reproductively inactive I G < I cut mature females confirmed the nonreproductive season observed from January to April 2015. Estimates of L 50 were based on the cumulative proportion of reproductively active mature females: both datasets showed a 'bumpy trajectory'. Considering the functional form of data and models, a second objective was to verify if each dataset presented a simple or double sigmoid trajectory and select the most suitable model through the Akaike information criterion. For both datasets, the best fitted model was the double sigmoidal M DS , while the single sigmoidal M SS had low performance and did not have statistical support. The M DS provided a L 50 value ca. 254 mm L T for both data sets. A trade-off between the model's correct fit and a reliable L 50 value was found, but this fact is not always considered when calculating the maturity, resulting in biased parameters. Correct data fitting may seem trivial, but the consequences for the conservation of immature individuals could be dramatic, affecting the population recruitment. In conclusion, the histologically calibrated I cut was suitable for classifying females of S. annulatus into reproductively inactive or active types, with an agreement percentage of 99%. The I cut = 2.06% can be useful for subsequent studies for this species.
Collapse
Affiliation(s)
- Carolina Salas-Singh
- Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Mazatlán, Mexico
| | - Enrique Morales-Bojórquez
- Centro de Investigaciones Biológicas del Noroeste SC. Av. Instituto Politécnico Nacional, La Paz, Mexico
| | - Hugo Aguirre-Villaseñor
- Instituto Nacional de Pesca y Acuacultura. Centro Regional de Investigación Acuícola y Pesquera-Mazatlán, Mazatlán, Mexico
| |
Collapse
|
3
|
Savva I, Chartosia N, Antoniou C, Kleitou P, Georgiou A, Stern N, Hadjioannou L, Jimenez C, Andreou V, Hall-Spencer JM, Kletou D. They are here to stay: the biology and ecology of lionfish (Pterois miles) in the Mediterranean Sea. JOURNAL OF FISH BIOLOGY 2020; 97:148-162. [PMID: 32249927 DOI: 10.1111/jfb.14340] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 04/01/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
The lionfish, Pterois miles, is one of the most recent Lessepsian immigrants into the Mediterranean Sea, and it poses a serious threat to marine ecosystems in the region. This study assesses the basic biology and ecology of lionfish in the Mediterranean, examining morphometrics, reproduction and diet as well as population structure and distribution. The population density of lionfish has increased dramatically in Cyprus since the first sighting in late 2012; by 2018 aggregations of up to 70 lionfish were found on rocky grounds with complex reefs and artificial reefs in depths of 0-50 m. Lionfish in Cyprus become mature within a year, and adults are capable of spawning year-round, with peak spawning in summer when the sea-surface temperature reaches 28.4°C. The Cypriot lionfish grow faster and bigger than in their native range, and females are more common than males. Lionfish are generalist predators in these waters, as also found in their native range, consuming a range of teleost and crustacean prey, some of which are of high economic value (e.g., Spicara smaris and Sparisoma cretense) or have an important role in local trophic webs (e.g., Chromis chromis). Overall, the reproductive patterns, the presence of juveniles and adults throughout the year, the rapid growth rates and the generalist diet indicate that lionfish are thriving and are now already well established in the region and could potentially become the serious nuisance that they are in their temperate and tropical western Atlantic-invasive range.
Collapse
Affiliation(s)
- Ioannis Savva
- Marine & Environmental Research (MER) Lab, Limassol, Cyprus
| | - Niki Chartosia
- Department of Biological Sciences, University of Cyprus, Nicosia, Cyprus
| | | | - Periklis Kleitou
- Marine & Environmental Research (MER) Lab, Limassol, Cyprus
- School of Biological and Marine Sciences, University of Plymouth, Plymouth, UK
| | - Andreas Georgiou
- Enalia Physis Environmental Research Centre, Nicosia, Cyprus
- KIOS Research and Innovation Centre of Excellence, University of Cyprus, Nicosia, Cyprus
| | - Nir Stern
- National Institute of Oceanography, Israel Oceanographic and Limnological Research, Haifa, Israel
| | | | - Carlos Jimenez
- Enalia Physis Environmental Research Centre, Nicosia, Cyprus
| | - Vasilis Andreou
- Enalia Physis Environmental Research Centre, Nicosia, Cyprus
| | | | | |
Collapse
|
4
|
Mion M, Thorsen A, Vitale F, Dierking J, Herrmann JP, Huwer B, von Dewitz B, Casini M. Effect of fish length and nutritional condition on the fecundity of distressed Atlantic cod Gadus morhua from the Baltic Sea. JOURNAL OF FISH BIOLOGY 2018; 92:1016-1034. [PMID: 29479694 DOI: 10.1111/jfb.13563] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 01/12/2018] [Indexed: 05/21/2023]
Abstract
The disappearance of larger individuals and the decrease in individual body condition suffered by Atlantic cod Gadus morhua in the eastern Baltic during the past two decades can be expected to affect the stock reproductive output. To investigate this, female G. morhua were collected during the spawning and pre-spawning period in 2015-2016. The current individual potential fecundity (FP ) of eastern Baltic G. morhua was estimated and analysed in relation to total length (LT ) and indices of nutritional status such as body condition (K) and hepato-somatic index (IH ) using generalized linear models. In addition, the current prevalence of atresia and its potential relation to K were investigated. Moreover, a calibration curve to estimate FP from oocyte diameter, based on the autodiametric oocyte counting method, was established for the first time for eastern Baltic G. morhua and can be used for future fecundity studies on this stock. The results showed that FP was mainly positively related to fish length, but K and IH also contributed significantly to the variation in FP . The model predicted that fish with K = 1·2 have a FP 51% higher than fish of the same LT with K = 0·8. The prevalence of fecundity regulation by atresia was 5·8%, but it was found only in fish in the pre-spawning maturity stage and with low K. Temporal changes in biological features such as the length composition and individual body condition of eastern Baltic G. morhua, should be accounted for when estimating stock reproductive potential.
Collapse
Affiliation(s)
- M Mion
- Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Turistgatan 5, 45330 Lysekil, Sweden
| | - A Thorsen
- Institute of Marine Research, P. O. Box 1870, Nordnes, N-5817, Bergen, Norway
| | - F Vitale
- Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Turistgatan 5, 45330 Lysekil, Sweden
| | - J Dierking
- GEOMAR Helmholtz Centre for Ocean Research, Düsternbrooker Weg 20, 24105 Kiel, Germany
| | - J P Herrmann
- Institute for Hydrobiology and Fisheries sciences, University of Hamburg, Hamburg, Germany
| | - B Huwer
- Technical University of Denmark, National Institute of Aquatic Resources, Kemitorvet, Building 202, 2800 Kgs. Lyngby, Denmark
| | - B von Dewitz
- GEOMAR Helmholtz Centre for Ocean Research, Düsternbrooker Weg 20, 24105 Kiel, Germany
| | - M Casini
- Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Turistgatan 5, 45330 Lysekil, Sweden
| |
Collapse
|
5
|
Ethmalosa fimbriata (Bowdich 1825), a Clupeid Fish That Exhibits Elevated Batch Fecundity in Hypersaline Waters. FISHES 2017. [DOI: 10.3390/fishes2030013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
6
|
Dhurmeea Z, Zudaire I, Chassot E, Cedras M, Nikolic N, Bourjea J, West W, Appadoo C, Bodin N. Reproductive Biology of Albacore Tuna (Thunnus alalunga) in the Western Indian Ocean. PLoS One 2016; 11:e0168605. [PMID: 28002431 PMCID: PMC5176184 DOI: 10.1371/journal.pone.0168605] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 12/02/2016] [Indexed: 11/19/2022] Open
Abstract
The reproductive biology of albacore tuna, Thunnus alalunga, in the western Indian Ocean was examined through analysis of the sex ratio, spawning season, length-at-maturity (L50), spawning frequency and fecundity. From 2013 to 2015, a total of 923 female and 867 male albacore were sampled. A bias in sex ratio was found in favor of females with fork length (LF) < 100 cm. Using histological analyses and gonadosomatic index, spawning was found to occur between 10°S and 30°S, mainly to the east of Madagascar from October to January. Large females contributed more to reproduction through their longer spawning period compared to small individuals. The L50 (mean ± standard error) of female albacore was estimated at 85.3 ± 0.7 cm LF. Albacore spawn on average every 2.2 days within the spawning region and spawning months, from November to January. Batch fecundity ranged between 0.26 and 2.09 million oocytes and the relative batch fecundity (mean ± standard deviation) was estimated at 53.4 ± 23.2 oocytes g-1 of somatic-gutted weight. The study provides new information on the reproductive development and classification of albacore in the western Indian Ocean. The reproductive parameters will reduce uncertainty in current stock assessment models which will eventually assist the fishery to be sustainable for future generations.
Collapse
Affiliation(s)
- Zahirah Dhurmeea
- Department of Biosciences, Faculty of Science, University of Mauritius, Réduit, Mauritius
- IRD—research unit MARine Biodiversity, Exploitation & Conservation (MARBEC), Fishing Port, Victoria, Mahé, Seychelles
- * E-mail:
| | - Iker Zudaire
- IRD—research unit MARine Biodiversity, Exploitation & Conservation (MARBEC), Fishing Port, Victoria, Mahé, Seychelles
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Emmanuel Chassot
- IRD—research unit MARine Biodiversity, Exploitation & Conservation (MARBEC), Fishing Port, Victoria, Mahé, Seychelles
- Seychelles Fishing Authority (SFA), Fishing Port, Victoria, Mahé, Seychelles
| | - Maria Cedras
- Seychelles Fishing Authority (SFA), Fishing Port, Victoria, Mahé, Seychelles
| | | | - Jérôme Bourjea
- Ifremer—research unit MARine Biodiversity, Exploitation & Conservation (MARBEC), Sète, France
| | - Wendy West
- Department of Agriculture Forestry and Fisheries (DAFF), Cape Town, South Africa
| | - Chandani Appadoo
- Department of Marine and Ocean Science, Fisheries and Mariculture, Faculty of Ocean Studies, University of Mauritius, Réduit, Mauritius
| | - Nathalie Bodin
- IRD—research unit MARine Biodiversity, Exploitation & Conservation (MARBEC), Fishing Port, Victoria, Mahé, Seychelles
- Seychelles Fishing Authority (SFA), Fishing Port, Victoria, Mahé, Seychelles
| |
Collapse
|
7
|
Grande M, Murua H, Zudaire I, Arsenault-Pernet EJ, Pernet F, Bodin N. Energy allocation strategy of skipjack tuna Katsuwonus pelamis during their reproductive cycle. JOURNAL OF FISH BIOLOGY 2016; 89:2434-2448. [PMID: 27730635 DOI: 10.1111/jfb.13125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 05/08/2016] [Accepted: 07/26/2016] [Indexed: 06/06/2023]
Abstract
The lipid composition of somatic and reproductive tissues was determined for female skipjack tuna Katsuwonus pelamis caught in the western Indian Ocean between latitude 10° N and 20° S and longitude 40° and 70° E. The highest total lipid (TL) contents were in the liver and gonads, with white muscle levels approximately three-fold lower. Three lipid classes dominated: triacylglycerols (TAG), sterol esters and wax esters (SE-WE) and phospholipids (PL). Collectively, these accounted for between 70 and 80% of TLs. Changes in lipid concentrations were evaluated over the maturation cycle. Immature fish had the lowest gonad and liver TL levels; concentrations of TL, TAG, SE-WE and PL accumulated from immature to mature (spawning-capable) phase, reflecting sustained vitellogenic activity of the liver and a transfer of lipids to developing oocytes from the onset of vitellogenesis. Gonado-somatic and hepato-somatic indices were positively correlated with each other and positively related to TL in the gonads and liver. Fulton's condition index and lipid concentrations in muscle did not vary significantly over the maturation cycle; fat content in the main storage tissues was undepleted as the ovary developed. Hence, K. pelamis apparently supports reproduction directly from food intake over the breeding season. In the gonads, reserve lipids (SE-WE and TAG) and sterols were related to batch fecundity but this was not the case for somatic and hepatic tissues. These results suggest that K. pelamis utilizes an income breeding strategy.
Collapse
Affiliation(s)
- M Grande
- AZTI-Tecnalia, Marine Research Division, Herrera Kaia-Portu aldea z/g, Pasaia, Gipuzkoa, Spain.
- ALBACORA S.A., Polígono Landabaso s/n, Bermeo, Spain.
| | - H Murua
- AZTI-Tecnalia, Marine Research Division, Herrera Kaia-Portu aldea z/g, Pasaia, Gipuzkoa, Spain
| | - I Zudaire
- AZTI-Tecnalia, Marine Research Division, Herrera Kaia-Portu aldea z/g, Pasaia, Gipuzkoa, Spain
- Institut de Recherche pour le Développement (IRD), UMR 248 MARBEC, Avenue Jean Monnet, BP 171, Sète, France
| | - E J Arsenault-Pernet
- Institut de Recherche pour le Développement (IRD), UMR 248 MARBEC, Avenue Jean Monnet, BP 171, Sète, France
| | - F Pernet
- Ifremer - Centre Bretagne- ZI de la Pointe du Diable-CS 10070 - 29280 Plouzané, Brest, France
| | - N Bodin
- Institut de Recherche pour le Développement (IRD), UMR 248 MARBEC, Victoria, Mahé, Seychelles
| |
Collapse
|
8
|
Costa EFS, Dias JF, Murua H. Closely Related Fishes Inhabiting Different Ecosystems Exhibit the Same Oocyte Production and Recruitment Pattern. THE BIOLOGICAL BULLETIN 2016; 230:96-109. [PMID: 27132132 DOI: 10.1086/bblv230n2p96] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Information on oocyte production and recruitment in phylogenetically related species can help in understanding the evolution of reproductive life-history traits in fish of indeterminate fecundity. The present study compared, for the first time, oocyte production and recruitment patterns between two closely related species: Stellifer brasiliensis and Stellifer rastrifer (Perciformes, Sciaenidae), in the southwestern Atlantic, Brazil. Specimens of S. brasiliensis were sampled from the coastal waters of Ubatuba, and samples of S. rastrifer were taken from the Cananéia Lagoon Estuarine System. Ovaries were investigated using histology and model-based stereology. The total number of oocytes per individual (N) and stage-specific oocyte packing density did not differ significantly between S. brasiliensis and S. rastrifer The number of pre-vitellogenic and vitellogenic oocytes were positively correlated with female total weight and length, and ovary weight in both species. Analysis of oocyte recruitment across their development stages revealed that approximately 5.9% of the standing stock oocytes larger than 50 μm in S. brasiliensis and 5.0% in S. rastrifer were recruited to form the next batches. Females of S. brasiliensis and S. rastrifer, in spawning-capable phase, exhibit the same oocyte production and recruitment patterns, showing no influences of the ecosystems on primary and secondary oocyte production.
Collapse
Affiliation(s)
- Eudriano F S Costa
- Postgraduate Program in Oceanography, University of São Paulo, Praça do Oceanográfico, 191, Cidade Universitária, 05508-900 São Paulo, SP, Brazil;
| | - June F Dias
- Department of Biological Oceanography, Oceanographic Institute, University of São Paulo, Praça do Oceanográfico, 191, Cidade Universitária, 05508-120 São Paulo, SP, Brazil; and
| | - Hilario Murua
- AZTI-Tecnalia, Marine Research Division, Herrera Kai-Portualdea z/g, Pasaia, Gipuzkoa 20110, Spain
| |
Collapse
|
9
|
Gunnarsson Á. Atlantic wolf-fish Anarhichas lupus population diversity: growth and maturation. JOURNAL OF FISH BIOLOGY 2014; 84:339-353. [PMID: 24410311 DOI: 10.1111/jfb.12288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 10/24/2013] [Indexed: 06/03/2023]
Abstract
Biological data from 1125 female Atlantic wolf-fish Anarhichas lupus were collected during 2002-2006 at their main spawning and fishing grounds in Iceland. The results demonstrated substantial annual variation in growth and maturity of female A. lupus. The fast growing females mature earlier than the slow growing ones. In addition, females mature at a larger size and greater age in warmer temperatures than colder ones. There was a strong negative relationship between temperature and growth, which may indicate that the sea temperature west of Iceland has risen above the optimum for growth of female A. lupus and thereby reduced the reproductive potential of the species.
Collapse
Affiliation(s)
- Á Gunnarsson
- Marine Research Institute in Reykjavík, Skúlagata 4, P. O. Box 1390, 121 Reykjavík, Iceland
| |
Collapse
|
10
|
Simões T, Carvalho J, Sousa A, Lemos MFL, Gil MM, Pedrosa R, Tecelão C. Seasonal variation in proximate composition and fatty acid profile of grey triggerfish (Balistes capriscus) captured along the coast of Portugal. J Food Sci 2013; 78:C691-5. [PMID: 23551246 DOI: 10.1111/1750-3841.12115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 02/18/2013] [Indexed: 11/28/2022]
Abstract
Proximate composition (ash, moisture, total protein, and fat contents) and fatty acid profile of Balistes capriscus (grey triggerfish) were assessed over a 6-months period (April to September, 2011) in animals captured along the coast of Peniche (Portugal). High protein (18.9% to 21.4%) and low lipid (0.5% to 0.8%) contents were determined. The highest lipid level was found in June-captured animals. High proportions of n-3 polyunsaturated fatty acids (n-3 PUFA) were observed (53.87 ± 2.00%) together with substantial quantities of oleic acid (27.58 ± 1.09%) and palmitic acid (16.52 ± 0.93%). Docosahexaenoic acid accounted for 77% of the total PUFA and was 7 times more abundant than eicosapentaenoic acid, and the n-3/n-6 ratio was 7.2. Gender did not influence lipid levels and the fatty acid profile, but seasonal variations were observed for PUFA and monounsaturated fatty acid contents. Overall, the nutritional properties of this underexploited species may be comparable to those of other lean fish species with higher economic value.
Collapse
Affiliation(s)
- Tiago Simões
- ESTM, Marine Resources Research Group, Polytechnic Inst. of Leiria, P-2520-641, Peniche, Portugal.
| | | | | | | | | | | | | |
Collapse
|
11
|
Maddams JC, McCormick MI. Not all offspring are created equal: variation in larval characteristics in a serially spawning damselfish. PLoS One 2012; 7:e48525. [PMID: 23155389 PMCID: PMC3498294 DOI: 10.1371/journal.pone.0048525] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 10/01/2012] [Indexed: 11/21/2022] Open
Abstract
The way organisms allocate their resources to growth and reproduction are key attributes differentiating life histories. Many organisms spawn multiple times in a breeding season, but few studies have investigated the impact of serial spawning on reproductive allocation. This study investigated whether resource allocation was influenced by parental characteristics and prior spawning history in a serial spawning tropical damselfish (Pomacentrus amboinensis). The offspring attributes of isolated parents of known characteristics were monitored over a 6-week breeding period in the field. Smaller females produced larvae of longer length and larger energy reserves at hatching. This finding is contrary to several other studies that found larger females produce offspring of greater quality. We found that resource allocation in the form of reproductive output was not influenced by the number of spawning events within the breeding season, with larger females producing the greatest number of offspring. Larval characteristics changed as spawning progressed. There was a general decline in length of larvae produced, with an increase in the size of the larval yolk-sac, for all females regardless of size as spawning progressed. This trend was accentuated by the smallest females. This change in larval characteristics may reflect a parental ability to forecast unfavourable conditions as the season progresses or a mechanism to ensure that some will survive no matter what conditions they encounter. This study highlights the importance of accounting for temporal changes in reproductive allocation in studies of reproductive trade-offs and investigations into the importance of parental effects.
Collapse
Affiliation(s)
- Jessica Claire Maddams
- School of Marine and Tropical Biology, James Cook University, Townsville, Queensland, Australia.
| | | |
Collapse
|
12
|
Lloret J, Faliex E, Shulman GE, Raga JA, Sasal P, Muñoz M, Casadevall M, Ahuir-Baraja AE, Montero FE, Repullés-Albelda A, Cardinale M, Rätz HJ, Vila S, Ferrer D. Fish Health and Fisheries, Implications for Stock Assessment and Management: The Mediterranean Example. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/10641262.2012.695817] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
13
|
Abstract
Recently, the importance of the female to population dynamics-especially her non-genetic contribution to offspring fitness or maternal effect-has received much attention in studies of a diverse collection of animal and plant taxa. Of particular interest to fisheries scientists and managers is the role of the demographic structure of the adult component of fish populations in the formation of future year classes. Traditionally, fisheries managers tended to assess whole populations without regard to variation between the individuals within the population. In doing so, they overlooked the variation in spawning production between individual females as a source of variation to recruitment magnitude and fluctuation. Indeed, intensive and/or selective harvesting of larger and older females, those that may produce more-and higher quality-offspring, has been implicated in the collapse of a number of important fish stocks. In a fisheries resource management context, whether capture fisheries or aquaculture, female demographics and inter-female differences warrant serious consideration in developing harvesting and breeding strategies, and in understanding general population dynamics. Here I review the range of female traits and environmental conditions females encounter which may influence the number or quality of their offspring via a maternal effect.
Collapse
Affiliation(s)
- Bridget S Green
- Marine Research Laboratory, Tasmanian Fisheries and Aquaculture Institute, University of Tasmania, Private Bag 49, Tasmania, 7001 Australia
| |
Collapse
|