Life‐history characteristics of an exploited bonefish Albula glossodonta population in a remote South Pacific atoll

Bonefishes Albula spp. are important components of subsistence fisheries and lucrative sport fishing industries throughout their circumtropical distribution. In Oceania, however, Albula spp. have historically been overexploited and there is a growing need to balance the demands of competing fishing...

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Vydáno v:Journal of fish biology Ročník 95; číslo 2; s. 562 - 574
Hlavní autoři: Filous, Alexander, Lennox, Robert J., Coleman, Richard R., Friedlander, Alan M., Clua, Eric E. G., Danylchuk, Andy J.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford, UK Blackwell Publishing Ltd 01.08.2019
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Témata:
age and growth
Albula
Albula glossodonta
Albula vulpes
Animals
artisanal fishery
Atolls
Biological properties
Biological samples
Body mass
body weight
Demographics
Fecundity
Female
Females
Fertility
fish
Fish harvest
Fisheries
Fishes - physiology
Fishing
Fishing communities
Fork length
French Polynesia
Gametocytes
gonadosomatic index
Growth patterns
Industry
Life history
Life History Traits
Longevity
Male
Males
Mortality
Natural mortality
Oceania
Oocytes
Parameter estimation
Reproduction
Seasons
Sexual maturity
Spawning
spawning aggregation
Spawning seasons
Sport fishing
sports
Subsistence fisheries
Oceania
French Polynesia
spawning aggregation
Albula glossodonta
age and growth
artisanal fishery
reproduction
ISSN:0022-1112, 1095-8649, 1095-8649
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Shrnutí:Bonefishes Albula spp. are important components of subsistence fisheries and lucrative sport fishing industries throughout their circumtropical distribution. In Oceania, however, Albula spp. have historically been overexploited and there is a growing need to balance the demands of competing fishing sectors, making the description of their life history a regional priority. To this aim, we collected biological samples from Albula spp. of Anaa atoll, French Polynesia, to identify the species that compose the stock and estimate their life‐history parameters including age, growth, reproduction and natural mortality. Our results indicate that Albula glossodonta is the species of bonefish present, with a maximum age that is below the, 20 year longevity of the genus (8 years in males and 10 years in females). Differential growth patterns existed between the two sexes (L∞ = 58, 78 cm fork length (LF) and K = 0.38, 0.21 for males and females, respectively). Males attained sexual maturity at 43 cm LF (c. 3 years) whereas females matured at 48 cm LF (c. 4 years) and oocyte production was significantly related to body mass, with a maximum batch fecundity of 1,133,767 oocytes in a 4406 g (70 cm LF) female. The gonado‐somatic index of harvested fishes indicated that the spawning season extends from March through September. Based on the observation of a, 20 year bonefish at the proximate Tetiaroa Atoll and several empirical models, estimates of natural mortality ranged from 0.21 to 0.68; however, an estimate of 0.21 was deemed most appropriate. This information facilitated the resurgence of a Rahui (temporary fishing closure) and community‐based management to protect A. glossodonta during a critical portion of their spawning season and in this context our results provide an important demographic baseline in evaluating the recovery of this fishery.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0022-1112
1095-8649
1095-8649
DOI:10.1111/jfb.14057