Instituto Canario Of Ciencias Marinas Iccm Aciisi

Las Palmas de Gran Canaria, Spain

Instituto Canario Of Ciencias Marinas Iccm Aciisi

Las Palmas de Gran Canaria, Spain

Time filter

Source Type

Tuset V.M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,CSIC - Institute of Marine Sciences | Espinosa D.I.,University of La Laguna | Garcia-Mederos A.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | And 2 more authors.
Fisheries Research | Year: 2011

The goal of this work was to elaborate on reproductive knowledge of the deep-sea red crab, Chaceon affinis, off the Canary Islands by providing information regarding its egg development and fecundity. Six stages for eggs were observed, from fully filled with yolk to the embryo occupying almost all the space inside the egg. A correlation was established between egg stage and the colour of the egg mass. Morphological analyses indicated that the eggs are spherical in shape and that they increase the 10.7% in maximum diameter from the initial to the final stage. Fecundity (AFE, annual fecundity estimation), defined as the number of eggs borne per females, was calculated with two methods, manual by hand counter and using an automated morphology system. No statistical differences for the relationships carapace width (CW)-AFE and total weight (TW)-AFE were detected between the two methods. The number of eggs ranged from 199,690 to 566,956 (105-160mm CW). A positive correlation was obtained between AFE and CW (r2=0.672) and TW (r2=0.785). © 2011 Elsevier B.V.


Arrasate-Lopez M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,CSIC - Institute of Marine Sciences | Santana J.I.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | And 3 more authors.
African Journal of Marine Science | Year: 2012

During the past 20 years, experimental cruises have been conducted around the Canary Islands (North-West Africa) to investigate the biodiversity of the deep-sea ecosystem and to explore new fisheries resources. Although pandalid shrimps were shown to be very abundant in this region, information is lacking regarding the best fishing method for catching the different species of shrimp. Here, two types of traps were tested, a semi-floating shrimp trap and a traditional bottom trap, in an effort to improve the fishing gear effectiveness and to reduce the capture of non-target species. In total, nine species were captured, which were categorised into three main groups based on their depth of capture: Plesionika edwardsii, P. narval and P. holtuisi (100-400 m); P. ensis, P. martia, P. williamsi and Heterocarpus ensifer (400-800 m); and H. grimaldii and H. laevigatus (800-1 300 m). Significant differences were found in the capture of the different species: P. narval, P. ensis, P. edwardsii and H. ensifer were captured more readily using the semi-floating traps, whereas P. martia, P. williamsi, H. grimaldii and H. laevigatus were caught more efficiently with traditional bottom traps. This intra-specific difference in their capture was considered to be due to the differential motility of the species in the water column. There were indications that P. edwardsii and H. ensifer are an unexploited resource that has the potential to support a viable and sustainable fishery using semi-floating shrimp traps. Furthermore, the deeper-dwelling pandalid shrimps, H. laevigatus and H. grimaldi, could be a secondary target species using bottom traps. © 2012 Copyright NISC (Pty) Ltd.


Tuset V.M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,CSIC - Institute of Marine Sciences | Piretti S.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Lombarte A.,CSIC - Institute of Marine Sciences | Gonzalez J.A.,Instituto Canario Of Ciencias Marinas Iccm Aciisi
Scientia Marina | Year: 2010

The sagittal otolith and eye diameter of two sympatric species of the genus Aphanopus, A. carbo and A. intermedius, from North Atlantic waters were investigated. The study objectives were to find morphometric variables of otoliths to identify the two species and relate ecomorphological characters of otolith and eye diameter to the depth distribution of each species. The otoliths of the two species are very similar, although significant differences in shape, otolith height and weight and the sulcus acusticus area were detected. The ratio between eye diameter and cephalic length (ED:CL ratio) was also significantly different. In both analyses A. carbo obtained higher values, which suggests that A. carbo and A. intermedius live in different spatial niches, and that A. carbo inhabits deeper waters. The ratio between the sulcus and otolith areas (S:O) was low compared to other fish species, which suggests that the hearing capacity of Aphanopus spp. is adapted to low frequency sound. This adaptation may be related to the oceanographic conditions in which these species live, and in particular to the characteristics of sound transmission in the "SOFAR channel".


Ayza O.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,CSIC - Institute of Marine Sciences | Gonzalez J.A.,Instituto Canario Of Ciencias Marinas Iccm Aciisi
Fisheries Research | Year: 2011

The aim of the study was to analyse the size, growth and size at maturity of Nephrops norvegicus in two areas off the Portuguese coast. Samples were collected between September 2006 and January 2007. A total of 2081 individuals ranging between 25 and 88mm carapace length were collected, measured and sexed. The estimated growth parameters were L∞=88.33mm CL, k=0.38years-1 for males and L∞=64.45mm CL, k=0.38years-1 for females in the northern area, and L∞=94.86mm CL, k=0.41years-1 for males and L∞=69.20mm CL, k=0.44years-1 for females in the central area. Size at maturity was 50.7mm CL in the northern area and 46.9mm CL in the central area. © 2010 Elsevier B.V.


Garcia-Mederos A.M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Tuset V.M.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Santana J.I.,Instituto Canario Of Ciencias Marinas Iccm Aciisi | Gonzalez J.A.,Instituto Canario Of Ciencias Marinas Iccm Aciisi
Journal of Applied Ichthyology | Year: 2010

The present study provides fisheries biology knowledge which will allow the implementation of regulatory measures contributing to the sustainability of the fisheries and the conservation of the stout beardfish Polymixia nobilis Lowe, 1838 off the Canary Islands, north eastern Atlantic Ocean. Males ranged between 16.5 and 38.4 cm fork length (FL) and females from 14.2 to 46.5 cm FL. Sex ratio by size classes provided significant differences in classes higher than 36 cm, being clearly unbalanced in favour of females. Individuals in maturing and mature stages were present during all months sampled, although a spawning peak is evident between April and June. Size at first maturity was estimated as 26 cm FL for females and 30 cm FL for males. Age was determined from annuli in whole otoliths. Age range was found to be 0-14 years for fish measuring 14.2 to 46.5 cm FL. It is a slow-growing and long-lived species. Significant differences in the growth parameters between sexes were detected. The von Bertalanffy growth parameters estimated for females (n = 213) were L∞ = 45.92 cm LF, k = 0.16 years-1 and t0 = -2.84 years; and for males (n = 186) L∞ = 36.44 cm LF, k = 0.26 years-1 and t0 = -2.16 years. Stomach analysis indicated some variations in the feeding habits with growth: individuals of small and medium sizes preyed on crustaceans and fishes, while large specimens preyed mainly on fishes. © 2010 Blackwell Verlag, Berlin.

Loading Instituto Canario Of Ciencias Marinas Iccm Aciisi collaborators
Loading Instituto Canario Of Ciencias Marinas Iccm Aciisi collaborators