Abstract：
:The octopus (Octopus maya) is one of the most important fish resources in the Mexican Gulf of Mexico with a mean annual yield of 9000 ton, and a reasonable number of jobs created; O. maya represents 80% of the total octopus catch, followed by Octopus vulgaris. There are two artisanal fleets based on Octopus maya and a middle-size fleet that covers both species. Catch-at-length structured data from the artisanal fleets, for the 1994 season (August 1st to December 15th) were used to analyze the O. maya population dynamics and stock and to estimate the current level of exploitation. Von Bertalanffy growth parameters were: L infinity = 252 mm, mantle length; K = 1.4 year-1; oscillation parameters C = 1.0, WP = 0.6; and tz = 0.842 years. A rough estimate of natural mortality was M = 2.2, total mortality from catch curve Z = 8.77, and exploitation rate F/Z = 0.75. This last value suggests an intensive exploitation, even when yield per recruit analysis indicates both fleets may increase the minimum legal size on about 10% to increase yields. The length-based VPA also shows that the stock is being exploited under its maximum acceptable biological limit. These apparently contradictory results are explained by biological and behavioral characteristics of this species. Because most females die after reproduction, a new gross estimation of natural mortality was computed as M = 3.3. The new estimate of exploitation rate was F/Z = 0.57. This new value coincides with results from the length-VPA and the Thompson and Bell methods, the former suggesting that a reduction of 20% in fishing mortality may provide larger yields. This fishery resource is fully exploited and current management measures must be revised to sustain and probably optimize yields.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Arreguín-Sánchez F,Solís-Ramírez MJ,González de la Rosa MEsubject
Has Abstractpub_date
2000-06-01 00:00:00pages
323-31issue
2-3eissn
0034-7744issn
2215-2075journal_volume
48pub_type
杂志文章abstract：:Nutrients and chlorophylls concentrations, as well as salinity, temperature and Secchi disk depth were determined from November 1999 to April 2000, at three stations and two depths, at Gandoca lagoon, Gandoca-Manzanillo National Wildlife Refuge, Limón, Costa Rica. Salinity profiles indicated that the lagoon was a salt...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2004-12-01 00:00:00
abstract：:Humoral response of paracoccidioidomycosis sera in hamsters with different Venezuelan isolates. Paracoccidioidomycosis (PCM) is a progressive systemic mycosis caused by the fungus Paraccocidioides brasiliensis (Pb), endemic to Venezuela and Latin America. In this study, eight different Venezuelan isolates obtained fro...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v57i3.5471
更新日期：2009-09-01 00:00:00
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journal_title：Revista de biologia tropical
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更新日期：2010-10-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v64i2.20691
更新日期：2016-06-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v55i2.6025
更新日期：2007-06-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1975-12-01 00:00:00
abstract：:The queen conch Eustrombus gigas is an important fisheries resource in the Caribbean region. In Cuba Island the studies about this resource are very scarce and particularly in the Southeastern regions of the country. With the aim to get important fishery information about this gastropod, adult Queen Conch density and ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v61i2.11165
更新日期：2013-06-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v54i1.13981
更新日期：2006-03-01 00:00:00
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journal_title：Revista de biologia tropical
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更新日期：2006-12-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-07-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2003-06-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2008-12-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-12-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2008-03-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v60i1.2769
更新日期：2012-03-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章,评审
doi：
更新日期：1988-11-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2003-03-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2014-03-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2010-10-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2000-12-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2006-09-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
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更新日期：1983-06-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2008-09-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2014-04-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1994-04-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2011-03-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1994-08-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v62i4.13199
更新日期：2014-12-01 00:00:00
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v64i3.20110
更新日期：2017-03-01 00:00:00
abstract：:The striped marlin (Tetrapturus audax) is found in temperate and tropical waters of the Pacific and Indian Ocean. It is particularly abundant in the southern tip of the Baja California peninsula. Specimens brought to Cabo San Lucas port (22 degrees 53' N y 109 degrees 54' W) by the sport fishery fleet that operates wi...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2004-12-01 00:00:00
