31 research outputs found
Listado de especies de peces (excluyendo túnidos) capturadas de forma accesoria por la flota de cerco tropical española en el área ICCAT
El objetivo principal del presente estudio es mostrar una lista verificada de las capturas
accesorias de peces (excluidas las especies de túnidos) por parte de la flota española de
cerco tropical en el área de ICCAT. Se ha identificado un total de 76 especies de peces
(excluidas las especies de túnidos) durante el período de estudio (2003-2017). También se
han identificado dos taxones que necesitan confirmación (Kajikia audax y Makaira
mazara)
An alternative index of abundance for Atlantic skipjack (Katsuwonus pelamis) based on catch ratio and abundance of a reference species.
Indices of abundance, frequently based on catch rates per unit effort (CPUE), are one of the main inputs to tropical tuna stock assessments. While standardized longline CPUE series are routinely obtained and used in the stock assessments of yellowfin and bigeye tunas, the standardization of the effort in fisheries targeting skipjack tuna is more problematic, due to several factors that are known to affect the efficiency of the fleets but are difficult to quantify. In this scenario, alternative approaches need to be tested. In this document, we propose an alternative approach based on the ratio in the catch of skipjack vs yellowfin tuna, using the abundance of the reference species as an offset in the standardization.En prens
Data Provision for Science-Based FAD Fishery Management: Spanish FAD Management Plan as a Case Study
The use of fish aggregating devices (FADs) in tropical tuna fisheries has increased significantly during recent decades. Concurrently, concern about juvenile tuna mortality, bycatch, and marine debris associated with FAD fisheries increased, and this led to the implementation of FAD management measures and more sustainable designs (e.g., non-entangling or biodegradable FADs, limits on active FADs, etc.). This document reviews data collection and reporting requirements of tuna-Regional Fisheries Management Organizations (t-RFMOs) on drifting FADs and summarizes the work carried out since 2010 under the Spanish FAD management plan to create an adequate standard data collection aimed at improving science-based decision making. The aim of this study is to assist in the strengthening of data collection systems through: (1) a review of the existing data requirements, (2) a review of the status of FAD data collection worldwide and identification of data gaps, and (3) recommendations aimed at improving FAD management through the strengthening of FAD data requirements. Due to the complexities of data collection, we summarize the difficulties faced when processing the data and propose concrete and practical solutions to improve both the data collection system and information quality.Postprin
Pesca de Túnidos Tropicales: Cooperación entre el sector pesquero y científico
Versión del edito
Best standards for data collection and reporting requirements on FOBs: towards a science-based FOB fishery management.
A major concern for tropical tunas, on these last years, has been the worldwide increasing use of drifting FOBs
by purse seiners, which are equipped with satellite buoys and echo-sounders. The use of these floating objects
has contributed to increase the catch of skipjack tuna, but also of juveniles of yellowfin and bigeye tunas.
Moreover, it has increased the amount of by-catch (including some species classified as vulnerable or
endangered) and has likely resulted in adverse effects on the ecology of fish and on vulnerable areas (e.g.
beaching events on coral reef areas). Despite the increasing FOB use and concerns, little information is
available on FOB use worldwide for an appropriate monitoring and management. Thus, FOB monitoring has
become a priority in all tuna t-RFMOs. However, the data collection and reporting requirements around FOBs
are not standardized and there are significant data gaps. The aim of this document is to review current
requirements and procedures in place and propose standards for data collection and submission on FOBs to tRFMOs. The proposals included in this document are the result of a collaborative work between scientists and
the fishing industry
Biodegradable DFADs: Current status and prospects
Until recently, dFAD structure, materials and designs have remained quite rudimentary and
virtually the same since their discovery, characterized by the increase of the dimensions and
prevailing heavy use of plastic components. Biodegradable materials are called to be an
important part of the solution, as they can faster degrade in the environment, free of toxins
and heavy metals, reducing their lifespan, and preventing them from accumulating in
sensitive areas once they are abandoned, lost or discarded. During last decades, regulatory
measures at tRFMOs have advanced in the gradual implementation of biodegradable
materials in dFAD constructions together with other measures limiting the number of active
dFADs and the use of netting materials. However, more clarity is needed starting with a
standardised definition of biodegradable dFADs among tRFMOs, to provide operational
guidance. Research with those natural and synthetic materials is required, along with
updated data collection for monitoring standards, as well as alternative and
complementary actions need to be explored to contribute to minimising dFAD adverse
effects on environment. Acknowledging the current difficulties for the implementation of
fully biodegradable dFADs a stepwise process towards the implementation of fully
biodegradable dFADs should be considered.Postprin
What causes hidradenitis suppurativa ?—15 years after
The 14 authors of the first review article on hidradenitis suppurativa (HS) pathogenesis published 2008 in EXPERIMENTAL DERMATOLOGY cumulating from the 1st International Hidradenitis Suppurativa Research Symposium held March 30–April 2, 2006 in Dessau, Germany with 33 participants were prophetic when they wrote “Hopefully, this heralds a welcome new tradition: to get to the molecular heart of HS pathogenesis, which can only be achieved by a renaissance of solid basic HS research, as the key to developing more effective HS therapy.” (Kurzen et al. What causes hidradenitis suppurativa? Exp Dermatol 2008;17:455). Fifteen years later, th
Túnidos tropicales: calentamiento global y seguridad alimentaria, una visión global
The term ‘tropical tuna’ refers to skipjack (Katsuwonus pelamis), bigeye (Thunnus obesus) and yellowfin tunas
(Thunnus albacares), which have a wide pantropical distribution. Tropical tunas inhabit waters with a sea surface
temperature with an optimal value around 20°C. Currently, two of these species are among the 7 species with higher
landings worldwide. In addition, it is expected that future tropical tuna stocks play a key role safeguarding food security.
The aim of this paper was to review the studies about the effect of both climatic oscillations and global warming on tropical
tuna populations. Moreover, it warns about the main challenges of fisheries biology in relation to the management of
stocks of tropical tunas, an important fishery resource, in the context of climate change. For this, a review of studies that
have addressed to date the effect of both climate oscillations and global warming on populations of tropical tunas was
performed