Tracking the southern Brazilian schools of Mugil liza during reproductive migration using VMS of purse seiners

Lemos, Valéria M.; Troca, Débora Fernanda Avila; Castello, Jorge Pablo; Vieira, João Paes

doi:10.3856/vol44-issue2-fulltext-5

Cited by 23 publications

(22 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The southern population reproduces in the coastal zone and most juveniles use estuaries, freshwater or coastal regions as nurseries (Fontoura et al ., ; Fortunato et al ., ; Vieira & Scalabrin, ). The southern population forms a spawning aggregation along the southern Brazilian coast that may extend from Santa Catarina to southern Paraná, depending on the intensity of the cold front (Lemos et al ., , ). The average size at first maturity ( L m ) of the southern population varies according to latitude.…”

Section: Introductionmentioning

confidence: 99%

Coastal zone use and migratory behaviour of the southern population of Mugil liza in Brazil

Albuquerque

Lemos

et al. 2019

Journal of Fish Biology

View full text Add to dashboard Cite

We analysed the ratios Sr:Ca and Ba:Ca in the otoliths of 55 adults of the southern population of Mugil liza in Brazil (Paraná to Rio Grande do Sul) to investigate its coastal zone use and migratory behaviour. All individual M. liza analysed had Sr:Ca and Ba:Ca values indicating that their birth was in the marine environment, which is consistent with the southern population migration to spawn in the ocean,. Juveniles exhibited at least three coastal use and recruitment strategies (contingents): the majority (89%) of M. liza juveniles migrated toward brackish water. They entered the estuary before completing the first year of life (64%) or after (25%) their first year of life. The remaining 11% did not appear to enter brackish or freshwater water as a nursery or at any point in their life cycle. Some adults returned to the estuary after spawning in the ocean but others (of both sexes) never returned to the estuary after spawning, remaining in the marine environment. The pattern of juvenile habitat use in the Brazilian southern population of M. liza seems to be recurrent throughout the extent of its distribution as a consequence of the reproductive spawning aggregation behaviour, which mixes all contingents (with marine or estuarine preferences).

show abstract

Section: Introductionmentioning

confidence: 99%

Coastal zone use and migratory behaviour of the southern population of Mugil liza in Brazil

Albuquerque

Lemos

et al. 2019

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…On the Atlantic coast of South America, Mugil liza is the main species with great importance in artisanal and industrial fishing (Reis, Vieira, & Duarte, ). Although environmental conditions in recent years were favourable to recruitment of this species, there was a decrease in juvenile stock due to over‐fishing of this species (Lemos, Ávila Troca, Castello, & Paes Vieira, ).…”

Section: Introductionmentioning

confidence: 99%

Effect of ascorbic acid supplementation on zootechnical performance, haematological parameters and sperm quality of lebranche mullet Mugil liza

et al. 2019

View full text Add to dashboard Cite

The feed provided to breeding fish is one of the main factors influencing the quality of fish gametes. This study was carried out to evaluate the influence of ascorbic acid on growth, haematological parameters and sperm quality of Lebranche mullet males (Mugil liza). Six diets with different levels of ascorbic acid (0; 53; 107; 216; 482 and 708 mg/kg) were tested in triplicate for 75 days. During spermiation (first gonadal maturation), 144 individuals (205.7 ± 11.5 g and 25.7 ± 0.4 cm) were randomly distributed in 18 experimental tanks. Growth parameters were evaluated at the beginning and end of the experiment. Fish blood was collected to analyse glucose, total protein and erythrocyte count (EC) (n = 9). Fish (n = 12) from each treatment were euthanized to determine hepatosomatic index (HSI) and gonadosomatic index (GSI). Semen was collected to evaluate spermatic density, cell membrane integrity and sperm motility. No difference (p > .05) was found on growth parameters, GSI, HSI and total protein. However, EC was lower in fish fed without ascorbic acid (the control group). Ascorbic acid supplementation provided positive effects on sperm characteristics. Fish from treatments with 53 and 107 mg/kg presented the best results for motility time (133.30 ± 4.25 and 135.00 ± 2.77 respectively). Treatments with 107, 216 and 708 mg/kg provided the best results for motility rate (92.0 ± 2.9%, 93.0 ± 5.8% and 93.0 ± 5.8% respectively). Supplementation with 107 and 216 mg/kg provided the best results for plasma membrane integrity (70.12 ± 9.10% and 76.3 ± 3.1% respectively). Lower spermatic density was observed in fish without ascorbic acid supplementation, although no difference was found in sperm density among the treatments with ascorbic acid (p < .05). Considering these results, supplementation of dietary ascorbic acid between 107 and 216 mg/kg optimizes the spermatic quality in males of lebranche mullet.

show abstract

“…However, the current management plan for M. liza is controversial due to lack of basic information (Lemos et al 2016), which is available only in the form of timediscontinuous official landings and unreliable information about the overall fishing effort directed at this resource. Given these multiple sources of uncertainty, it is important to collect all available data, integrating them as effectively as possible with other relevant knowledge so that appropriate biological reference points can be estimated as well as possible.…”

Section: Introductionmentioning

confidence: 99%

Bayesian state-space models with multiple CPUE data: the case of a mullet fishery

et al. 2017

Self Cite

View full text Add to dashboard Cite

Summary:We propose a novel Bayesian hierarchical structure of state-space surplus production models that accommodate multiple catch per unit effort (CPUE) data of various fisheries exploiting the same stock. The advantage of this approach in data-limited stock assessment is the possibility of borrowing strength among different data sources to estimate reference points useful for management decisions. The model is applied to thirteen years of data from seven fisheries of the lebranche mullet (Mugil liza) southern population, distributed along the southern and southeastern shelf regions of Brazil. The results indicate that this modelling strategy is useful and has room for extensions. There are reasons for concern about the sustainability of the mullet stock, although the wide posterior credibility intervals for key reference points preclude conclusive statistical evidence at this time.Keywords: hierarchical models; MCMC; multiple fisheries; data-limited; stock assessment; Mugil liza.Modelos bayesianos espacio-temporales con datos múltiples de CPUE: el caso de una pesquería de lebranche Resumen: Proponemos una nueva estructura jerárquica bayesiana para modelos de producción excedente espacio-temporales que permite incorporar datos de captura por unidad de esfuerzo (CPUE) de diversas fuentes para varias pesquerías que explotan el mismo stock. La ventaja de este enfoque en la evaluación de stocks con datos limitados es la posibilidad de reforzar las estimaciones a partir de diferentes fuentes de datos para estimar puntos de referencia útiles para las decisiones de gestión. El modelo se aplica a trece años de datos de siete pesquerías de la población meridional de lebranche (Mugil liza), distribuidas a lo largo de las regiones sur y sudeste de Brasil. Los resultados indican que esta estrategia de modelado es útil y puede formar la base de futuras extensiones. En cuanto a la sostenibilidad del efectivo de lebranche, hay razones para preocuparse, aunque los amplios intervalos de credibilidad posterior en los puntos clave de referencia excluyen evidencia estadística concluyente en este momento.Palabras clave: modelos jerárquicos; MCMC; pesquerías múltiples; datos limitados; evaluación de stocks; Mugil liza. Citation/Como citar este artículo: Sant'Ana R., Kinas P.G., Miranda L.V., Schwingel P.R., Castello J.P., Vieira J.P. 2017. Bayesian state-space models with multiple CPUE data: the case of a mullet fishery. Sci. Mar. 81(3): 361-370. doi: http://dx

show abstract

Tracking the southern Brazilian schools of Mugil liza during reproductive migration using VMS of purse seiners

Cited by 23 publications

References 17 publications

Coastal zone use and migratory behaviour of the southern population of Mugil liza in Brazil

Coastal zone use and migratory behaviour of the southern population of Mugil liza in Brazil

Effect of ascorbic acid supplementation on zootechnical performance, haematological parameters and sperm quality of lebranche mullet Mugil liza

Bayesian state-space models with multiple CPUE data: the case of a mullet fishery

Contact Info

Product

Resources

About