Elasmobranchii (sharks and rays), which have peculiar vulnerable life-history traits, are highly threatened by fishing activities. Indeed, between 53% 71% of Mediterranean elasmobranch species at risk extinction. In this context, using the abundance MSY (AMSY) model, present study provides an assessment 20 batoids 16 shark in Strait Sicily, sampled during a bottom trawl survey from 1995 to 2020...

Based on length frequency data of miter squid ( Uroteuthis chinensis ) collected in the northeastern South China Sea 1975–1977, 1997–1999, and 2018–2019, asymptotic length, optimal at first capture, relative mortality, biomass stock were estimated using length-based Bayesian estimation (LBB). The LBB-estimated for 2018–2019 was smaller. Optimal lengths capture later far exceeded average catches...

Spotted rabbitfish (Siganus guttatus Bloch 1787) are valuable commercial fish species. Research on the species has been carried out in waters of Kotania Bay, aiming to obtain information about size, density and potential Data collected total length (TL), weight number individual at four observation stations using 120m bottom gillnet with mesh size 2.0, 2.5, 3.0 dan 3.5 inches. The is operated a...

The assessment of fish stocks is often limited by a lack comprehensive data. Therefore, catch-based methods are increasingly being used because the availability more catch However, models may perform differently for species with different traits and fishing histories. In this study, we investigated performance life history traits, histories, under length selections. We compared simulated biomas...

Bycatch species such as skates and rays are for most of them not subject to analytical stock assessment. However, their life history characteristics increased vulnerability fisheries. In the English Channel North Sea area, three main landed Rajidae Raja clavata, brachyura montagui. The current management measure is a global TAC, common all species. Data process assessment available these specie...

Information on stock status is available only for a few of the species forming catch assemblage rapido fishery North-central Adriatic Sea (Mediterranean Sea). Species that are caught almost exclusively by this gear, either as target (such Pectinidae ) or accessory catches flatfishes apart from common sole), remain unassessed mainly due to lack data and biological information. Based cluster anal...

Abstract The Baltic fisheries are in distress. In the Central Baltic, management is challenged by reduced cod stock productivity, and altered species interactions. Here, we use an age-structured, ecological–economic multispecies model, which includes latest biological economic knowledge, to advance our understanding of optimal related trade-offs between user groups under such conditions. We con...

Walleye (Sander vitreus) populations in Alberta, Canada, collapsed by the mid-1990s and were a case study paper Canada’s Recreational Fisheries: The Invisible Collapse? Here we fit age-structured population dynamics models to data from landscape-scale monitoring program assess walleye status reconstruct recruitment following invisible collapse. Assessments indicated that featured low F msy valu...

Fishery resources play an important role in the national economy and ecological diversity China; it is of great significance to evaluate rationally exploit fishery resources. Most fisheries off coast China are data-limited, as complex assessment models not suitable for its resource assessment. Therefore, data-limited among current research hotspots. In this paper, two new (Bayesian state–space ...

The case of fisheries management illustrates how the inherent structural instability of ecosystems can have deep-running policy implications. We contrast ten types of management plans to achieve maximum sustainable yields (MSY) from multiple stocks and compare their effectiveness based on a management strategy evaluation (MSE) that uses complex food webs in its operating model. Plans that prima...