e-journal

Energy acquisition and allocation to egg production in relation to fish reproductive strategies

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Oogenesis in fishes follows a universal plan; yet, due to differences in the synchrony and rate of egg development, spawning frequency varies from daily to once in a lifetime. Some species spawn and feed in separate areas, during different seasons, by storing energy and drawing on it later for reproduction (i.e. capital breeding). Other species spawn using energy acquired locally, throughout a prolonged spawning season, allocating energy directly to reproduction (i.e. income breeding). Capital breeders tend to ovulate all at once and are more likely to be distributed at boreal latitudes. Income breeding allows small fish to overcome allometric constraints on egg production. Income breeders can recover more quickly when goodfeeding conditions are re-established, which is a benefit to adults regarding bethedging spawning strategies. Many species exhibit mixed capital- and incomebreedingpatterns. An individual’s position along this capital–income continuum may shift with ontogeny or in relation to environmental conditions, so breeding patterns are a conditional reproductive strategy. Poor-feeding environments can lead to delayed maturation, skipped spawning, fewer spawning events per season or fewer eggs produced per event. In a few cases, variations in feeding environments appear to affect recruitment variability. These flexible processes of energy acquisition and allocation allow females to prioritize their own condition over their propagules’ condition at any given spawning opportunity, thereby investing energy cautiously to maximize lifetime reproductive value. These findings have implications for temporal and spatial sampling designs, for measurement and interpretation of fecundity, and for interpreting fishery and ecosystem assessments.

Keywords Allocation of surplus energy, capital breeding, income breeding, lifetime fecundity, oogenesis, reproductive strategy, reproductive tactic

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Ketersediaan

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Informasi Detail

Judul Seri

Fish and fisheries

No. Panggil

-

Penerbit

ITALY : ., 2013

Deskripsi Fisik

Fish and fisheries 2015, 16, 23–57

Bahasa

English

ISBN/ISSN

DOI: 10.1111/faf.120

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

-

Edisi

2015, 16, 23–57

Subjek

PERIKANAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia/Agus

Versi lain/terkait

Lampiran Berkas

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