Abstract Oogenesis in fishes follows a universal plan; yet, due to differences the synchrony and rate of egg development, spawning frequency varies from daily once lifetime. Some species spawn feed separate areas, during different seasons, by storing energy drawing on it later for reproduction (i.e. capital breeding). Other using acquired locally, throughout prolonged season, allocating directly income Capital breeders tend ovulate all at are more likely be distributed boreal latitudes....

Abstract The usefulness and importance of histological techniques in reproductive studies have been widely discussed for gonochoristic fish species. In the case hermaphroditic fishes, histology is a particularly important tool proper identification sexual pattern (i.e., sequential, simultaneous, or nonfunctional hermaphroditism). We used approach to describe hermaphroditism, dynamics follicle development, spawning patterns three species from northwestern Mediterranean Sea (Balearic Islands,...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 503:219-233 (2014) - DOI: https://doi.org/10.3354/meps10745 Selective exploitation of spatially structured coastal fish populations by recreational anglers may lead evolutionary downsizing adults Josep Alós1,2,*, Miquel Palmer1, Ignacio A. Catalan1, Alexandre Alonso-Fernández3, Gotzon Basterretxea1, Antoni...

Abstract Species Distribution Models are pivotal for fisheries management. There has been an increasing number of fishery data sources available, making integration attractive way to improve model predictions. A wide range methods have applied integrate different datasets in disciplines. We focus on the use Integrated (ISDMs) due their capacity formally accommodate types and scale proportional gear efficiencies. ISDMs joint modelling information from parameter estimation by fitting shared...

Individual re-identification is critical to track population changes in order assess status, being particularly relevant species with conservation concerns and difficult access like marine organisms. For this, we propose photo-identification via deep learning as a non-invasive technique discriminate between individuals of the undulate skate (Raja undulata). Nevertheless, accruing enough training samples might be achieve case underwater fish images. We develop novel methodology based on...

Populations of large pelagic sharks are declining worldwide due to overfishing. Determining the overlap between shark populations and fishing activities is important inform conservation measures. However, for many threatened whereabouts particularly vulnerable life-history stages - such as pregnant females juveniles poorly known. Here, we investigated spatial distribution size classes, energy transfer reproductive states endangered shortfin mako, Isurus oxyrinchus, using spatially resolved...

Despite the recognised effectiveness of networks Marine Protected Areas (MPAs) as a biodiversity conservation instrument, nowadays MPA network design frequently disregards importance connectivity patterns. In case sedentary marine populations, stems not only from stochastic nature physical environment that affects early-life stages dispersal, but also spawning stock attributes affect reproductive output (e.g., passive eggs and larvae) its survivorship. Early-life are virtually impossible to...

The effectiveness of Marine Protected Areas (MPAs) depends on the mobility populations that are target protection, with sedentary species likely to spend more time under protection even within small MPAs. However, little is understood about how individual variation in may influence risk crossing an MPA border, as well fitness costs associated being exposed spillover fisheries. Here we investigated repeatability spatial behaviour, its role determining probability at (i.e. fishery) and...

Pouting, Trisopterus luscus is harvested commercially on the Galician shelf by Spanish inshore artisanal fleet. In spite of a substantial decrease in pouting catches, fishery regulations are limited to size length restrictions. This study provides biological data including length-at-maturity based histological methods, seasonal maturation, spawning and fecundity. A collection 443 females, from 17 42 cm total length, were sampled landings (December 2003 December 2004). Pouting was estimated...

Phenotypic plasticity occurs when a genotype produces variable phenotypes under different environments; the shapes of such responses are known as norms reaction. The genetic scale at which reaction can be determined is restricted by experimental unit that exposed to environments. This has limited their description beyond family level in higher organisms, thus hindering our understanding differences individual. Using three-year common-garden experiment, we quantify sperm performance...

Diet studies on the endangered and genetically distinct Iberian population of southern harbour porpoise Phocoena phocoena are scarce. The present study provides updated information feeding ecology this cetacean along Galician coast (NW Spain) over last 3 decades (1990-2018). stomach contents 72 stranded porpoises were analysed to determine diet composition, which factors affect dietary variability estimate overlap between target species fisheries in area, one most important fishing regions...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 515:239-250 (2014) - DOI: https://doi.org/10.3354/meps11018 Life-history and activity shape catchability in a sedentary fish David Villegas-Ríos1,6,*, Josep Alós2, Miquel Palmer3, Susan K. Lowerre-Barbieri4, Rafael Bañón5, Alexandre Alonso-Fernández1, Fran Saborido-Rey1 1Instituto de Investigacións Mariñas...

Abstract Shark populations have suffered dramatic declines across the world as a result of overfishing. Marine protected areas (MPAs) can help restore overfished populations; however, their effectiveness largely relies on understanding ecology targeted species. This study investigated spatial intensely harvested but understudied small spotted catshark ( Scyliorhinus canicula ) through acoustic telemetry in Cíes Islands, MPA north‐west Iberian Peninsula. There were significant effects diel,...

For many fish populations reproductive patterns remain unknown, which often results in inadequate management strategies. Timing and intraspecific variability the main traits of ballan wrasse (Labrus bergylta) were investigated based on microscopic analysis gonads sampled from NW Spain 2009–2012. This species displays two body colour patterns, plain spotted, coexist sympatry. Females spawned January to April whereas spawning capable males present almost year-round. Length at 50% maturity did...

Fish populations are often treated as homogeneous units in typical fishery management, thereby tacitly ignoring potential intraspecific variation which can lead to imprecise management rules. However, life-history traits is widespread and related a variety of factors. We investigated the comparative age-based demography two main colour patterns Labrus bergylta (plain spotted, coexist sympatry), commercially valuable resource NE Atlantic. Individuals were aged based on otolith readings after...

The protection of fish nurseries has been recognized as a useful tool to efficiently manage fisheries given that protected areas enhance the recruitment target species. To identify and locate potential nursery areas, solid understanding species-environment relationships their spatio-temporal dynamics is needed. Within this context, in study we assess where European hake ( Merluccius merluccius ) recruits persistently aggregate northern continental shelf Iberian Peninsula. Hake recruit data...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 345:271-279 (2007) - DOI: https://doi.org/10.3354/meps06961 Growth of juvenile turbot in response food pellets contaminated by fuel oil from tanker ‘Prestige’ Fran Saborido-Rey1,*, Rosario Domínguez-Petit1, Javier Tomás2, Beatriz Morales-Nin2, Alexandre Alonso-Fernandez1 1Instituto de Investigaciones Marinas...