scholarly journals Channel catfish (Ictalurus punctatus Rafinesque, 1818): current status and problematic situation in Mexico

2017 ◽  
Vol 43 (3) ◽  
pp. 424-434
Author(s):  
Ana Laura Lara-Rivera ◽  
Gaspar Manuel Parra-Bracamonte ◽  
Ana María Sifuentes-Rincón ◽  
Héctor Hugo Gojón-Báez ◽  
Hervey Rodríguez-González ◽  
...  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Production Systems ◽  
Natural Habitat ◽  
Field Analysis ◽  
Current Status ◽  
Lack Of Information ◽  
Study Results ◽  
Great Heterogeneity ◽  
Productive Potential

Channel catfish (Ictalurus punctatus) is one of the endemic fishes of North America with the greatest potential for aquaculture. Despite this, data of its current distribution is scare and many aspects of its dynamic and productive performance remain unknown. In the present study, results are reported from a literature search and field analysis for describing the current status of channel catfish in Mexico regarding its historical and current geographical distribution as well as the problems faced by fish farmers and production systems. We were able to identify a lack of information and indicators to properly assess the extent of the species natural habitat and its productive potential. The quality and availability of water are among the main problems of the industry. Food costs represent the larger cost-loss for producers and there is great heterogeneity on the management of both breeding and production farms. Much of the production dynamics follows a pattern of trial and error. It became clear the need to optimize and standardize the processes on the channel catfish production system and to properly characterize domestic and wild populations to maximize their potential.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Water Temperature ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Natural Habitat ◽  
Climatic Conditions ◽  
Water Bodies ◽  
The Soviet Union ◽  
Private Entrepreneurs ◽  
Marine Lagoon ◽  
Local Water

<em>Abstract</em>.—The channel catfish <em>Ictalurus punctatus</em> was first introduced from the United States to the Soviet Union in 1972–1979. From the Krasnodar region of Russia, it was introduced into Georgia during 1976–1978. Ecological studies of channel catfish were initiated along with the naturalization of this new species. Channel catfish were initially reproduced and reared in aquaculture ponds, and offspring from these ponds were used to stock natural water bodies, in particular lakes, where natural populations were formed. The climatic conditions of Georgia are close to the natural habitat of channel catfish. The number of days with water temperature higher than 20°C is about 120–140, and the accumulated heat reaches up to 2,400–2,792 degrees/d. They were also introduced into Lake Paliastomi (open marine lagoon) where the salinity fluctuates up to 8–14‰. These fish were caught in areas with salinity up to 14‰ and were often encountered in waters of 4–5‰ salinity or greater. Channel catfish grew well in the low-lying warm water bodies: they reached, on average, 19 g at age 1, 310 g at age 2, 1,300 g at age 3, 2,900 g at age 4, and 4,600 g at age 5. The fish became sexually mature in 3 years. Spawning occurred from May to June, when water temperature reached 24°C or higher. Channel catfish fed on a variety of insects, crustaceans, other bottom-dwelling arthropods, and fishes, especially crucian carp <em>Carassius carassius</em>, which is a strong competitor and is widely spread in the local water bodies. Channel catfish were considered a valuable introduction because they grew well, were adaptable to a wide range of conditions, were highly palatable, and provided important recreational sport fisheries, commercial fisheries, and aquaculture industries. There was concern that channel catfish were being overharvested, and consequently, in 2005, Georgia passed a bill that provided for more restrictive fishing regulations to protect this species from overharvest. The role of society and private entrepreneurs in the protection of channel catfish and regulation of its fisheries is important.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
River Estuary ◽  
Current Status ◽  
Catch Per Unit Effort ◽  
Delaware River ◽  
Conservation Ecology ◽  
Delaware River Estuary ◽  
Variable Recruitment ◽  
Native White

<em>Abstract</em>.—In the Delaware River estuary, native white catfish <em>Ameiurus catus</em> have appeared to decline as the introduced channel catfish <em>Ictalurus punctatus</em> has become more abundant. To determine the current status of these populations and the habitats they use, I surveyed four zones of the Delaware River estuary from April to November 2007. Hoop nets (<EM>N</EM> = 497) were set in main-stem river, lower tributary, and middle tributary habitats. Upper tributary habitats near the head of tide were angled. Our findings indicated that the ratio of channel catfish to white catfish was less than documented in the early 1990s. Channel catfish and white catfish were found throughout the study area, during all seasons. Channel catfish catch per unit effort was significantly greater in the river than in tributary habitats. Relative condition differed seasonally among zones and zone groups. Both species had unstable age structures, indicating variable recruitment. Variable recruitment may account for past differences in ratios of channel catfish to white catfish. Channel catfish in this study lived longer (22 years) when compared to channel catfish collected in other nearby river systems. Few brown bullhead <em>A. nebulosus</em> and no yellow bullhead <em>A. natalis</em> or flathead catfish <em>Pylodictis olivaris </em>were collected.

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Size Structure ◽  
Prey Availability ◽  
Relative Weight ◽  
Negative Influence ◽  
River Channel ◽  
Population Characteristics ◽  
Current Status ◽  
Platte River

<em>Abstract</em>.—Catfish angling is popular throughout North America and catfish are the most sought after fish species in the Platte River, Nebraska. However, catfish management in the Platte River is minimal as little is known about current populations. Our objective was to determine the current status of channel catfish <em>Ictalurus punctatus</em> populations in the central and lower Platte River. Specifically, we evaluated population characteristics including relative abundance, size structure and condition. The current Platte River channel catfish population appears to be comparable to many Midwestern rivers. Channel catfish populations in the central Platte River had lower relative abundances (CPUE [catch per unit effort] = 1.1 ± 0.2 versus 2.3 ± 0.2 fish/net-night using 25-mm hoop nets), higher condition (<em>W<sub>r</sub></em> [relative weight] = 92 ± 1.7 versus 83 ± 0.7 using all gears) and greater size structure (PSD [proportional size distribution] = 35 ± 7 versus 24 ± 3 using all gears) compared to lower Platte River channel catfish. Possible factors influencing differences in channel catfish population characteristics are prey availability, flow modifications, habitat characteristics, and angler exploitation. Water manipulation from the Loup River Power Canal was also identified as a possible negative influence on lower Platte River channel catfish populations because hydropeaking is likely creating a stressful environment. However, channel catfish in the central Platte River may have benefited from recent high flows that likely increased productivity and food availability in the central Platte River.

scholarly journals Diversity and genetic origin of introduced channel catfish (Ictalurus punctatus Rafinesque, 1818) to central-west Mexico

2017 ◽  
Vol 44 (3) ◽  
pp. 525-534
Author(s):  
Diana Suarez-Salgado ◽  
José Herrera-Camacho ◽  
Ana Laura Lara-Rivera ◽  
Gaspar Manuel Parra-Bracamonte
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Production Systems ◽  
Paired Comparison ◽  
Diverse Populations ◽  
Documentary Evidence ◽  
Genetic Origin ◽  
West Mexico ◽  
Microsatellite Dna Markers ◽  
Founder Populations

The channel catfish is an important aquaculture species in Mexico mostly managed in traditional production systems. The state of Tamaulipas has been the source of diverse populations of channel catfish in the country, however there is no documentary evidence of this. Therefore, the objective of this study was to confirm the genetic origin of populations of channel catfish (Ictalurus punctatus) of west central Mexico by microsatellite DNA markers. The study included four domestic populations from Michoacán, Zacatecas and Jalisco and two reference founder populations from Tamaulipas and Coahuila. The analysis was performed with a panel of 13 microsatellites. Some parameters of diversity and population structure were evaluated. The six populations showed excess of heterozygotes and a coefficient endogamy FIS ≤ -0.014. The analysis of gene structure was determined by a paired comparison populations, and indicated the 5.92% of variation among populations (FST= 0.059, P < 0.001). The assessment approaches identified the population of Tamaulipas as the most likely genetic origin of channel catfish populations currently used in the evaluated states.

Preparation and characterization of collagen polypeptide chelated calcium from fish bone powder of channel catfish(Ictalurus punctatus)

2012 ◽  
Vol 36 (2) ◽  
pp. 314
Author(s):  
Jian-feng LU ◽  
Chang-wei MENG ◽  
Jin LI ◽  
Zi-hui GONG ◽  
Lin LIN ◽  
...  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Fish Bone ◽  
Bone Powder

Bioeconomic Analysis of Flavobacterium columnare Vaccine Pond Trials with Channel Catfish Ictalurus punctatus

2021 ◽  
Author(s):  
Jillian K. Malecki ◽  
Luke A. Roy ◽  
Cova R. Arias ◽  
Miles D. Lange ◽  
Craig A. Shoemaker ◽  
...  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Flavobacterium Columnare

Analysis of Customer-Oriented Information for Tourism Enterprises Under the Social Media Environment

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ziwei Yang
Keyword(s):  
Social Media ◽  
Market Competition ◽  
Virtual Community ◽  
Current Status ◽  
Information Analysis ◽  
Value Analysis ◽  
Media Environment ◽  
The Social ◽  
Study Results ◽  
Tourism Enterprises

Abstract Social media is a virtual community or network platform that the public uses to achieve self-creation and it’s sharing with others; under the social media environment, self-media channels become more abundant, and the autonomy and originality of content dissemination are also continuously enhanced. When tourism enterprises face increasing market competition, personalized and targeted promotional programs will, to a certain extent, have a certain appeal to competitors’ potential customer groups, thereby providing tourism enterprise customers with relevant benefits for oriental information, and also serving as an important way for companies to develop new customers. Based on the summary and analysis of previous literature works, this paper expounded the research status and significance of social media environment, elaborated the development background, current status and future challenges of customer-oriented information analysis for tourism enterprises, introduced the methods and principles of customer’s transfer value and life cycle and social media environment’s cognitive composition, proposed a sentiment model of tourist-oriented information analysis under the social media environment, and analysed the management strategy and scheduling platform of customer-oriented information, constructed an analysis system of customer-oriented information in social media environment, performed the reliability, validity, transfer and perception value analysis of customer-oriented information and finally conducted case simulation and its result analysis. The study results of this paper provide a reference for further researches on the customer-oriented information analysis for tourism enterprises under the social media environment.

Novel polymorphisms in Stearoyl‐CoA Desaturase (SCD) and Fatty Acid Desaturase 2 (FADS2) in channel catfish ( Ictalurus punctatus, Rafinesque, 1818 )

2021 ◽  
Author(s):  
Oliva Mendoza‐Pacheco ◽  
Gaspar Manuel Parra‐Bracamonte ◽  
Xochitl Fabiola De la Rosa‐Reyna ◽  
Ana María Sifuentes‐Rincón ◽  
Isidro Otoniel Montelongo‐Alfaro ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Fatty Acid Desaturase ◽  
Stearoyl Coa Desaturase ◽  
Fatty Acid Desaturase 2

scholarly journals Pollination Potential in Portugal: Leveraging an Ecosystem Service for Sustainable Agricultural Productivity

Land ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 431
Author(s):  
Caroline Wentling ◽  
Felipe S. Campos ◽  
João David ◽  
Pedro Cabral
Keyword(s):  
Land Management ◽  
Management Practices ◽  
Production Systems ◽  
Local Level ◽  
Well Being ◽  
Food Sources ◽  
Pollination Services ◽  
Pollinator Abundance ◽  
Study Results ◽  
Administrative Boundary

As urbanization and agriculture increase worldwide, habitats and food sources for wild pollinators are often fragmented or destroyed. As wild pollinators contribute both resilience and variety to agricultural fields, it is desirable to implement land management practices that preserve their well-being and ability to contribute to food production systems. This study evaluates continental Portugal for its change in suitability to host bee’s pollinator species (Apis mellifera) from 1990 to 2018. It uses the InVEST crop pollination modeling tool and CORINE Land Cover, as well as parameterization to produce pollinator abundance and supply maps. These are generalized to municipality boundaries to provide actionable insights to farmers and policymakers and strengthen land management practices. It finds that the potential for pollination services is growing, with averages of both pollinator abundance and supply indices improving by 8.76% across the continental territory in 28 years. The study results are validated using another pollination index derived from a study that is based on expert opinion and field sampling in a sub-region of Portugal. This method of aggregation of model results and comparison of the percent difference by administrative boundary has the potential to better inform both policymakers and farmers about the pollination potential on a local level, as well as inspire interventions for future productivity.

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