Development of techniques for the collection and culture of wild-caught fertilised snapper (Chrysophrys auratus) eggs for stock enhancement purposes

Partridge, Gavin J.; Ginbey, B. M.; Woolley, L.D.; Fairclough, David V.; Crisafulli, Brett; Chaplin, Jennifer A.; Prokop, Natasha; Dias, Joana; Bertram, Andrea; Jenkins, G.I.

doi:10.1016/j.fishres.2016.08.025

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…This is a promising area for future research because egg quality in fishes has been linked to female condition, body size and age, as well as food availability and water temperature (Brooks et al, 1997;Carter et al, 2015;Donelson et al, 2010;Hixon et al, 2014;Kjørsvik et al, 1990;Pankhurst & Munday, 2011), which are factors that can operate at more localized scales relevant to NTMRs. Furthermore, direct sampling of newly spawned and fertilized fish eggs in the wild is feasible (Bowling, 2014;Partridge et al, 2017) and may be more acceptable to local stakeholders than destructive sampling of female fish inside NTMRs to measure egg output. Relating egg quality parameters such as size, lipid content, development rates and hatching success (Kjørsvik et al, 1990) to local demographic and environmental patterns such as fish density, size, age and sex structure, spawning behaviour and reef habitat conditions inside and outside NTMRs could generate deeper insights into the ecological processes that are most influential in determining the strength of recruitment subsidies from NTMRs.…”

Section: Discussionmentioning

confidence: 99%

Development of reproductive potential in protogynous coral reef fishes within Philippine no‐take marine reserves

Bucol

Abesamis

Stockwell

et al. 2021

Journal of Fish Biology

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Empirical evidence for increases in the reproductive potential (egg output per unit area) of coral reef fish in no-take marine reserves (NTMRs) is sparse. Here, we inferred the development of reproductive potential in two species of protogynous reef fishes, Chlorurus bleekeri (Labridae: Scarinae) and Cephalopholis argus (Epinephelidae), inside and outside of Philippine NTMRs. We estimated key reproductive parameters and applied these to species-specific density and length data from 17 NTMRs (durations of protection 0-11 years) and paired fished sites (controls) in a space-for-time substitution approach. For C. argus, we also used density and length data collected almost annually over 29 years from a NTMR and an adjacent control at Apo Island. The results suggest that C. bleekeri can develop 6.0 times greater reproductive potential in NTMRs than controls after 11 years of protection, equivalent to approximately 582,000 more eggs produced 500 m À2 inside NTMRs. Enhancement of reproductive potential in C. argus was not evident after 11 years in the space-for-time substitution. At Apo Island NTMR, reproductive potential of C. argus increased approximately 6-fold over 29 years but NTMR/control ratios in reproductive potential decreased through time (from 3.2 to 2.4), probably due to spillover of C. argus from the NTMR to the control. C. argus was estimated to produce approximately 113,000 more eggs 500 m À2 inside Apo Island NTMR at the 29th year of protection. Ratios of reproductive potential between NTMR and controls in C. bleekeri and C. argus were often greater than corresponding ratios in density or biomass. The study underscores the importance of species-specific reproductive life history traits that drive variation in the development of larval fish subsidies that originate from NTMRs.

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