Egg production methods in marine fisheries: An introduction

Bernal, M.; Somarakis, Stylianos; Witthames, Peter R.; Damme, C.J.G. van; Uriarte, Andrés; Lo, Nancy C. H.; Dickey‐Collas, Mark

doi:10.1016/j.fishres.2012.01.001

Cited by 39 publications

(22 citation statements)

References 69 publications

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“…POF prevalence and aging is important for spawning frequency estimation as an intrinsic part of spawning stock biomass assessments by egg production methods (EPMs), a common technique used worldwide on predominately small pelagics (Bernal et al ., 2012). POF absorption is a temperature‐dependent process, as demonstrated in captive Atlantic menhaden [ Brevoortia tyrannus (Latrobe 1802)], where POFs were difficult to distinguish after 36 h of maintenance at 19–20°C, and resorption was less advanced at 15–18°C (Fitzhugh & Hettler, 1971).…”

Section: Elevated Temperature and Female Fish: From Oogenesis To Egg mentioning

confidence: 99%

From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology

Alix

Kjesbu

Anderson

2020

Journal of Fish Biology

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Ambient temperature modulates reproductive processes, especially in poikilotherms such as teleosts. Consequently, global warming is expected to impact the reproductive function of fish, which has implications for wild population dynamics, fisheries and aquaculture. In this extensive review spanning tropical and cold‐water environments, we examine the impact of higher‐than‐optimal temperatures on teleost reproductive development and physiology across reproductive stages, species, generations and sexes. In doing so, we demonstrate that warmer‐than‐optimal temperatures can affect every stage of reproductive development from puberty through to the act of spawning, and these responses are mediated by age at spawning and are associated with changes in physiology at multiple levels of the brain–pituitary–gonad axis. Response to temperature is often species‐specific and changes with environmental history/transgenerational conditioning, and the amplitude, timing and duration of thermal exposure within a generation. Thermally driven changes to physiology, gamete development and maturation typically culminate in poor sperm and oocyte quality, and/or advancement/delay/inhibition of ovulation/spermiation and spawning. Although the field of teleost reproduction and temperature is advanced in many respects, we identify areas where research is lacking, especially for males and egg quality from “omics” perspectives. Climate‐driven warming will continue to disturb teleost reproductive performance and therefore guide future research, especially in the emerging areas of transgenerational acclimation and epigenetic studies, which will help to understand and project climate change impacts on wild populations and could also have implications for aquaculture.

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Section: Elevated Temperature and Female Fish: From Oogenesis To Egg mentioning

confidence: 99%

From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology

Alix

Kjesbu

Anderson

2020

Journal of Fish Biology

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“…Secondly, despite its wide use due to no other fisheries independent information being available, a number of biases have been identified and cautions issued on the links between ichthyoplankton survey data and adult biomass in a variety of harvested species (Bernal et al. ; Kraus et al. ).…”

Section: Discussionmentioning

confidence: 99%

Harvested populations are more variable only in more variable environments

Cameron

O’Sullivan

Reynolds

et al. 2016

Ecology and Evolution

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The interaction between environmental variation and population dynamics is of major importance, particularly for managed and economically important species, and especially given contemporary changes in climate variability. Recent analyses of exploited animal populations contested whether exploitation or environmental variation has the greatest influence on the stability of population dynamics, with consequences for variation in yield and extinction risk. Theoretical studies however have shown that harvesting can increase or decrease population variability depending on environmental variation, and requested controlled empirical studies to test predictions. Here, we use an invertebrate model species in experimental microcosms to explore the interaction between selective harvesting and environmental variation in food availability in affecting the variability of stage‐structured animal populations over 20 generations. In a constant food environment, harvesting adults had negligible impact on population variability or population size, but in the variable food environments, harvesting adults increased population variability and reduced its size. The impact of harvesting on population variability differed between proportional and threshold harvesting, between randomly and periodically varying environments, and at different points of the time series. Our study suggests that predicting the responses to selective harvesting is sensitive to the demographic structures and processes that emerge in environments with different patterns of environmental variation.

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“…Visual identification of the eggs and larvae to species can be inherently difficult and misidentification could lead to the potential overestimation of spawning biomass (Bernal et al , ). Molecular DNA‐based approaches have become increasingly useful in recent years in aiding species identifications, particularly at early developmental stages when distinctive morphological characteristics are often absent or highly plastic (Coffroth & Mulawka, ; Ovenden et al , ).…”

Section: Résumé Of Analysis On Eggs Including Sampling Stations Numbmentioning

confidence: 99%

Real‐time PCR validation of visually identified snapper Chrysophrys auratus (Sparidae) eggs

Dias

Wakefield

Fairclough

et al. 2015

Journal of Fish Biology

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Egg production methods in marine fisheries: An introduction

Cited by 39 publications

References 69 publications

From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology

From gametogenesis to spawning: How climate‐driven warming affects teleost reproductive biology

Harvested populations are more variable only in more variable environments

Real‐time PCR validation of visually identified snapper Chrysophrys auratus (Sparidae) eggs

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