Estimates of batch fecundity and spawning fraction for the southern stock of horse mackerel (Trachurus trachurus) in ICES Division IXa

Gonçalves, Patrícia; Costa, Ana Maria; Murta, Alberto G.

doi:10.1093/icesjms/fsp066

Cited by 23 publications

(8 citation statements)

References 11 publications

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“…This difference in the spawning frequency may rely on geographical, ecological and behavioural differences as happens in other species like the sardine, Sardina pilchardus and horse mackerel, Trachurus trachurus. For this species, Gonçalves et al (2009) reported spawning frequency from 4.9 to 13.2 days in different months of spawning season for the Iberian coast stock while for Greek waters, Karlou-Riga and Economidis (1997) mentioned values of 5.8 and 4.8 for two successive reproductive periods. In fact, and according to these authors, spawning frequency may change from year to year and therefore might be another adaptive response to unfavourable conditions occurring within the spawning season.…”

Section: Discussionmentioning

confidence: 92%

“…The estimated relative batch fecundity (22 ± 17 oocytes per gram of individual) is low when compared to other indeterminate species such as Trachurus trachurus (Gonçalves et al 2009), Engraulis mordax (Hunter et al 1985), Merluccius merluccius , Sardina pilchardus (Zwolinski et al 2001) and even with the same species living in the waters of the Canary Islands (García-Díaz et al 2006). However, the prolonged spawning season and the short interval between batches may compensate for the comparatively low batch fecundity.…”

Section: Discussionmentioning

confidence: 99%

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Reproductive patterns of blacktail comber (Serranus atricauda, Serranidae) from south-west Portugal seamounts

et al. 2013

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The knowledge of the reproductive strategy is essential for the comprehensive understanding of the population dynamics of any fish species. This study intends to define the spawning season, verify the type of fecundity regulation and estimate relative annual fecundity for Serranus atricauda inhabiting the south-west of Portugal seamounts (Gorringe, Ampère and Lion). Monthly samples, between September 2010 and December 2011, were obtained from commercial vessels. This species is synchronously hermaphroditic, and mature individuals were found all year round, with gonadosomatic index peak from February to September. No clear relation between hepatosomatic index and Fulton's condition factor and gonadal development was found, and therefore, it is probable that reproductive success depends more on environmental conditions and food availability during the spawning season than on body energy reserves. No gap exists between pre-vitellogenic and vitellogenic oocytes and the oocyte size-frequency distribution during the main spawning season show no dominant cohort progressing through time. The number of standing stock of advanced vitellogenic oocytes showed an increase trend along the spawning season decreasing only at its end and the relative intensity of a-atresia was always low throughout this period with an increase towards the end. All these criteria corroborate the indeterminate fecundity type assigned to S. atricauda in previous studies. Mean relative annual fecundity estimated was 5,655 ± 4,321 oocytes per gram of gutted weight.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Reproductive patterns of blacktail comber (Serranus atricauda, Serranidae) from south-west Portugal seamounts

et al. 2013

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“…), and for still others the basic biology is insufficiently known to allow estimation (Gonçalves et al . ). It is relatively easy to measure fecundity of fishes with synchronous or group‐synchronous oocyte development.…”

Section: Introductionmentioning

confidence: 97%

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

et al. 2013

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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 good‐feeding conditions are re‐established, which is a benefit to adults regarding bet‐hedging spawning strategies. Many species exhibit mixed capital‐ and income‐breeding patterns. 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.

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“…Fecundity was estimated as batch fecundity (defined as the number of oocytes spawned per batch) for each specimen using the gravimetric method combined with image analysis as explained by . This estimation facilitates the measurement (diameter in μm) and the count of the oocytes in a subsample of a given weight (predefined arbitrarily approximately at 0.05 g to reduce any size effect of the subsample between estimates) taken from the central region of the ovary (Kraus et al 2005, Gonçalves et al 2009, Witthames et al 2009). Batch fecundity (F B ) was estimated according to with the formula…”

Section: Methodsmentioning

confidence: 99%

Reproductive biology of the southern pufferfish, Sphoeroides nephelus (Actinopterygii: Tetraodontiformes: Tetraodontidae), in the northern coast off the Yucatan Peninsula, Mexico

Perez¹,

González‐Salas²,

Hernández³

et al. 2019

Acta Ichthyol. Piscat.

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Background. Overexploitation of fishery resources has led to the capture of alternative species of a lower trophic level, considered previously unprofitable or unfit for human consumption. The southern pufferfish, Sphoeroides nephelus (Goode et Bean, 1882), is a bycatch species of the recreational fishery in the USA and Mexico. Unlike other species of the genus Sphoeroides, there is no background on their reproductive cycle. Therefore, this study aimed to describe several reproductive traits (sex ratio, gonadal development, annual reproductive cycle, and fecundity) of specimens from the northern coast of the Yucatan Peninsula, Mexico. This kind of information might serve as a point of reference for its potential use either in the pharmaceutical industry, aquarium trade, as well as in aquaculture. Materials and methods. The reproductive biology of the southern pufferfish was described based on 189 females and 223 males, caught off the northern coast off the Yucatan, Mexico, during an annual cycle. Several reproductive traits, such as the annual cycle of gonad development, sex ratio, and the batch fecundity were determined. Results. The sex ratio showed no significant difference from 1 ÷ 1 ratio. Male's reproductive season lasted from August to May, although females were spawning from August to April. The size at 50% maturity was estimated at 14.93 cm TL for females. Batch fecundity ranged between 59 087 and 367 022 oocytes (mean 176 456) per spawning batch, and it was significantly fitted to both female size and weight based on power and linear regression models, respectively. The relative batch fecundity was estimated at 828 ± 182 oocytes per gram of eviscerated weight, and 11 989 ± 4774 oocytes per gram of gonad weight. Conclusions. It was determined that S. nephelus exhibited 1 ÷ 1 sex ratio, an asynchronous development of oocytes and indeterminate fecundity with batch spawning. The species has a protracted reproductive season that lasted almost all year round with peaks in February-March (before of the dry season) and a brief inactive period in June-July (before of the wet season). This latter information should be helpful to obtain a broodstock that would be the base to produce fingerlings to be raised, instead of collecting individuals from the wild.

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Estimates of batch fecundity and spawning fraction for the southern stock of horse mackerel (Trachurus trachurus) in ICES Division IXa

Cited by 23 publications

References 11 publications

Reproductive patterns of blacktail comber (Serranus atricauda, Serranidae) from south-west Portugal seamounts

Reproductive patterns of blacktail comber (Serranus atricauda, Serranidae) from south-west Portugal seamounts

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

Reproductive biology of the southern pufferfish, Sphoeroides nephelus (Actinopterygii: Tetraodontiformes: Tetraodontidae), in the northern coast off the Yucatan Peninsula, Mexico

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