Les modalités du cycle sexuel du poulpe Octopus vulgaris du Sud marocain (Tantan, Boujdour)

Idrissi, Farah Hounaida; Koueta, Noussithé; Idhalla, Mohamed; Belghyti, Driss; Bencherifi, Salah

doi:10.1016/j.crvi.2006.08.007

Cited by 13 publications

(5 citation statements)

References 12 publications

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“…The start of the winter trips (December 2016 and December 2017) detected very high yields composed mainly of young individuals; this month (December) corresponds to the end of the period of a main recruitment (end of the autumn season). this finding is in agreement with the result of a study carried out by Idrissi et al (2006) on the reproduction of Octopus vulgaris in southern Morocco.In their study, by monitoring the gonado somatic ratio (GSR)they recorded the presence of two spawning periods: an intense spring laying from March to July, and a less intense fall laying between September and October. Another study showed that the laying during July will give rise to high yields of month of November (Sánchez & Obarti, 1993).…”

Section: -Monthly Analysis Of Catchessupporting

confidence: 93%

Temporal abundance and distribution of Octopus vulgaris (Cuvier, 1797) in the southern Atlantic waters of Morocco.

al.¹

2021

Egypt. J. of Aquatic Biolo. and Fish.

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A study on the presence of Octopus vulgaris (Cuvier, 1797) in the southern Atlantic coastal waters of Morocco was carried out using data collected by boarding a cephalopod offshore trawler operating in this area by calculating the catch per unit effort (CPUE). The study showed a remarkable abundance of young Octopus individuals in terms of catches compared to large individuals over the entire study period, whether day or night, with lower yields during the nights. Winter trips produced the highest yields. The first days of resumption of fishing, (after a closed season) relating to each trip, showed very large quantities of catch except for the 2016 summer trips. Yields between the 2016 and 2017 summer trip remain relatively constant, while those of the winter trip of 2017/2018 experienced a very significant fall, with a quota achievement rate not reaching 49% compared to 81% achieved during the 2016/2017 winter trip. The results obtained by this study concluded that, such management of Octopus vulgaris requires first and foremost good control of its temporal distribution based on the knowledge of the biological and physical phenomena, which interact and govern the abundance and the fluctuations of the stocks of this species.

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Section: -Monthly Analysis Of Catchessupporting

confidence: 93%

Temporal abundance and distribution of Octopus vulgaris (Cuvier, 1797) in the southern Atlantic waters of Morocco.

al.¹

2021

Egypt. J. of Aquatic Biolo. and Fish.

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“…The length-weight relationships were similar to those reported for octopuses caught by trawlers in adjacent areas (GUERRA & MANR QUEZ, 1980;QUETGLAS et al, 1998;IDRISSI et al, 2006), showing higher values of the allometric exponent than those reported in studies based on octopuses caught by traps (S NCHEZ & OBARTI, 1993;SILVA et al, 2002;OTERO et al, 2007). Length-weight relationship parameters are dependent on the range of data used (MOREY et al, 2003).…”

Section: Reproduction and Life Historysupporting

confidence: 64%

Fisheries and reproductive biology of Octopus vulgaris (Mollusca: Cephalopoda) in the Gulf of Alicante (Northwestern Mediterranean)

et al. 2011

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The common octopus Octopus vulgarisCuvier, 1797 is the most fished cephalopod species along the Spanish coasts. Its catches are highly fluctuating due to the short life cycle of the species and to the annual variability of the recruitment pattern, strongly dependent on the environmental conditions affecting the eggs and paralarvae. This study examines the common octopus fishery, the catch composition, and the main features of the reproductive biology of this species in the Gulf of Alicante (Spanish Eastern coast, Western Mediterranean FAO division 37.1.1). The common octopus fishery was studied analysing the monthly landing and effort data by fishing gear from 1994 to 2005. Monthly samplings of the commercial O. vulgarislandings from trawlers and clay pots from January 2004 to December 2005 resulted in the measuring of 1833 specimens to enable analysis of the catch composition, and allowed the biological sampling of 1176 individuals to provide the reproductive parameters of the species in the study area. The length-weight relationship calculated for the species was BW = 0.51 * DML 2.87. The yearly sex ratios (males:females) were 1:1 (trawl, 2004), 1:0.74 (trawl, 2005), and 1:0.88 (clay pots, 2005). The size (dorsal mantle length, DML) at maturity of the species in the study area was 9.67 cm for males and 14.38 cm for females. The gonadosomatic index reached a peak between April and July for males and in July for females. The Fulton condition index was lower in both sexes between June and September, and for males in November-December, whereas for both sexes the values of the digestive gland index were at their maximum between June and December. The energy allocation between somatic and reproductive growth was investigated and the results suggested that the energy spent on reproduction mainly came from feeding, and not from energy stored in the mantle tissues or in the digestive gland

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“…The different types of cells were described in accordance with our microscopic observations, taking into account also the previous histological studies made by Khallahi (2001), Golçalves et al (2002), Khallahi & Inejih (2002), Rodriguez-Rua et al (2005) and Idrissi et al (2006).…”

Section: Methodsmentioning

confidence: 59%

Development of sexual organs and fecundity in Octopus vulgaris Cuvier, 1797 from the Sardinian waters (Mediterranean Sea)

et al. 2013

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In this paper we report information about the sexual maturity process of 245 Octopus vulgaris specimens (75 females and 170 males) from the Mediterranean Sea. For both sexes, six stages of sexual maturity (immature, developing, maturing, mature, spawning, and spent) are identified on the basis of macroscopic and microscopic observations of the reproductive system and linked with some reproductive indices. A good correspondence between gonad appearance and its histological structure is observed, highlighting, in females, how oviducal gland morphology plays a crucial role in the macroscopic evaluation of maturity. The Gonadosomatic and Hayashi indices, in the two genders, and the Oviducal Gland index in females alone do not allow distinguishing all the stages in an irrefutable way. Data on the potential fecundity, oocyte and spermatophore size are reported and compared with literature. In addition, spermatophore components are also computed. The results reported in this paper lead to easy identification of the different phases of sexual maturation of O. vulgaris and could constitute an important tool for defining assessment models in view of sound management of this species.

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Les modalités du cycle sexuel du poulpe Octopus vulgaris du Sud marocain (Tantan, Boujdour)

Cited by 13 publications

References 12 publications

Temporal abundance and distribution of Octopus vulgaris (Cuvier, 1797) in the southern Atlantic waters of Morocco.

Temporal abundance and distribution of Octopus vulgaris (Cuvier, 1797) in the southern Atlantic waters of Morocco.

Fisheries and reproductive biology of Octopus vulgaris (Mollusca: Cephalopoda) in the Gulf of Alicante (Northwestern Mediterranean)

Development of sexual organs and fecundity in Octopus vulgaris Cuvier, 1797 from the Sardinian waters (Mediterranean Sea)

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