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Animals
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Assessment and Management of Cephalopod Fisheries and Ecosystems
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Assessment and Management of Cephalopod Fisheries and Ecosystems

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Aquatic Animals".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 6641

Special Issue Editors

Prof. Dr. Bilin Liu

E-Mail Website
Guest Editor
College of Marine Sciences, Shanghai Ocean University, Shanghai, China
Interests: cephalopod; species recognition; fishery biology
Dr. Zhou Fang

E-Mail Website
Guest Editor
College of Marine Sciences, Shanghai Ocean University, Shanghai, China
Interests: cephalopod; life history; geometric morphometrics; squid

Special Issue Information

Dear Colleagues,

Cephalopods are very important invertebrates in the world’s oceans. They play important roles not only in marine ecosystems but also in marine fisheries. Cephalopods present a rapid growth process with rapacious feeding behavior and strong adaptability to the surrounding environment, earning them the name of “opportunists” in the marine ecosystem. Despite the catch decline in groundfish, the catch of cephalopods has steadily continued to increase. Considering their remarkable importance in the world’s fisheries and the dynamics of the marine ecosystem, we present this Special Issue to collect new studies and advances in understanding the fisheries and ecosystem of cephalopods. The scope includes but is not limited to the following aspects: fishery biology, fishery ecology, habitat suitability, stock assessment and management, and ecosystem evaluation.

Prof. Dr. Bilin Liu
Dr. Zhou Fang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • cephalopod
  • fishery biology
  • fishery ecology
  • stock assessment
  • habitat suitability

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Published Papers (4 papers)

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Research

13 pages, 2259 KiB  
Article
Environmental and Anthropogenic Influences on Coliform Concentrations in the Octopus insularis Production Chain in the Veracruz Reef System, Gulf of Mexico
by Sarai Acuña-Ramírez, María de Lourdes Jiménez-Badillo, Gabriela Galindo-Cortes, Angel Marval-Rodríguez, María del Refugio Castañeda-Chávez, Christian Reyes-Velázquez, Hectorina Rodulfo-Carvajal and Marcos De Donato-Capote
Animals 2023, 13(19), 3049; https://doi.org/10.3390/ani13193049 - 28 Sep 2023
Viewed by 1089
Abstract
Coliforms are relatively common in aquatic environments, but their concentrations can be increased by environmental changes and anthropogenic activities, thus impacting fisheries resources. To determine the microbiological quality in the octopus production chain (capture, post-capture, processing and commercialization), total (TC) and fecal (FC) [...] Read more.
Coliforms are relatively common in aquatic environments, but their concentrations can be increased by environmental changes and anthropogenic activities, thus impacting fisheries resources. To determine the microbiological quality in the octopus production chain (capture, post-capture, processing and commercialization), total (TC) and fecal (FC) coliforms were quantified in sea water, fresh octopus, fresh water, ice and octopus in two presentations: packed in ice and boiled. Samples came from fishing zones Enmedio, Chopa and La Gallega at the Veracruz Reef System (VRS) during dry, rainy and windy seasons. The coliforms were determined using the most probable number technique (MPN). The most relevant results indicated that octopus packed in ice coming from the commercialization stage had FC levels >540 MPN/100 g, which exceeded the permissible limits (230 MPN/100 g). Therefore, these products present a risk for human consumption. Differences in FC were observed in octopuses between the three fishing zones (H = 8.697; p = 0.0129) and among the three climatic seasons, increasing during the rainy season, highlighting La Gallega with 203.33 ± 63 MPN (H = 7.200; p = 0.0273). The results provide evidence of the environmental and anthropogenic influences on coliform concentrations and the urgent need to implement an efficient cold chain throughout octopus production stages with adequate handling practices to reverse this situation. Full article
(This article belongs to the Special Issue Assessment and Management of Cephalopod Fisheries and Ecosystems)
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18 pages, 6020 KiB  
Article
Fusing Local Shallow Features and Global Deep Features to Identify Beaks
by Qi He, Qianqian Zhao, Danfeng Zhao, Bilin Liu and Moxian Chu
Animals 2023, 13(18), 2891; https://doi.org/10.3390/ani13182891 - 12 Sep 2023
Cited by 1 | Viewed by 1287
Abstract
Cephalopods are an essential component of marine ecosystems, which are of great significance for the development of marine resources, ecological balance, and human food supply. At the same time, the preservation of cephalopod resources and the promotion of sustainable utilization also require attention. [...] Read more.
Cephalopods are an essential component of marine ecosystems, which are of great significance for the development of marine resources, ecological balance, and human food supply. At the same time, the preservation of cephalopod resources and the promotion of sustainable utilization also require attention. Many studies on the classification of cephalopods focus on the analysis of their beaks. In this study, we propose a feature fusion-based method for the identification of beaks, which uses the convolutional neural network (CNN) model as its basic architecture and a multi-class support vector machine (SVM) for classification. First, two local shallow features are extracted, namely the histogram of the orientation gradient (HOG) and the local binary pattern (LBP), and classified using SVM. Second, multiple CNN models were used for end-to-end learning to identify the beaks, and model performance was compared. Finally, the global deep features of beaks were extracted from the Resnet50 model, fused with the two local shallow features, and classified using SVM. The experimental results demonstrate that the feature fusion model can effectively fuse multiple features to recognize beaks and improve classification accuracy. Among them, the HOG+Resnet50 method has the highest accuracy in recognizing the upper and lower beaks, with 91.88% and 93.63%, respectively. Therefore, this new approach facilitated identification studies of cephalopod beaks. Full article
(This article belongs to the Special Issue Assessment and Management of Cephalopod Fisheries and Ecosystems)
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17 pages, 1705 KiB  
Article
Insights on the Evolutionary History and Genetic Patterns of Octopus vulgaris Cuvier, 1797 in the Northeastern Atlantic Using Mitochondrial DNA
by Trinidad Pérez, Andrea Romero-Bascones, Negin Pirhadi, Ruth Coya, María del Pino Fernández-Rueda, Isabel Márquez, Lucía García-Flórez and Yaisel J. Borrell
Animals 2023, 13(17), 2708; https://doi.org/10.3390/ani13172708 - 25 Aug 2023
Viewed by 1529
Abstract
Octopus vulgaris is one of the most harvested octopus species in the world. In the Iberian Peninsula, there are several small-scale fisheries that have a long-term tradition of harvesting octopus. The Asturias fleet (in Northern Spain) has an internationally recognized MSC label for [...] Read more.
Octopus vulgaris is one of the most harvested octopus species in the world. In the Iberian Peninsula, there are several small-scale fisheries that have a long-term tradition of harvesting octopus. The Asturias fleet (in Northern Spain) has an internationally recognized MSC label for its exploitation. Of concern, genetic assessments of exploited stocks are currently scarce, which could prevent the implementation of adequate managing strategies. We use two mitochondrial regions (cytochrome oxidase subunit 1 and control region) to analyze the genetic status and evolutionary events that conditioned octopus populations’ characteristics in the Northeastern Atlantic. A total of 90 individuals were sampled from three different localities in the Iberian Peninsula as well as a location in Macaronesia. Temporal genetic analyses on Asturias and Algarve populations were also performed. Results indicated the absence of fine spatial genetic structuring but showed the Canary Islands (in Macaronesia) as the most distinct population. Our analyses detected two distinct clades, already described in the literature, but, for the first time, we confirmed the presence of the α-southern haplogroup in the Northern Iberian Peninsula. This result indicates a more continuous cline for the distribution of these two haplogroups than previously reported. Temporal changes in the distribution of both haplogroups in contact zones were also detected. Full article
(This article belongs to the Special Issue Assessment and Management of Cephalopod Fisheries and Ecosystems)
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23 pages, 8037 KiB  
Article
Ontogenetic Variation and Sexual Dimorphism of Beaks among Four Cephalopod Species Based on Geometric Morphometrics
by Chao Wang and Zhou Fang
Animals 2023, 13(4), 752; https://doi.org/10.3390/ani13040752 - 19 Feb 2023
Cited by 1 | Viewed by 2066
Abstract
Investigating the ontogenetic variation of biological individuals helps us to fully understand the characteristics of evolution. In order to explore the ontogenetic variation and sexual dimorphism of the beak shape in Octopus minor, Uroteuthis edulis, Sepia esculenta and Sthenoteuthis oualaniensis of [...] Read more.
Investigating the ontogenetic variation of biological individuals helps us to fully understand the characteristics of evolution. In order to explore the ontogenetic variation and sexual dimorphism of the beak shape in Octopus minor, Uroteuthis edulis, Sepia esculenta and Sthenoteuthis oualaniensis of the China’s coastal waters, the differences between immature and mature stages and the sex-linked differences in the beak shape and size were analyzed with geometric morphometrics methods in this study. The results of Procrustes analysis of variance, principal component analysis and multivariate regression showed that the shapes of the upper beaks of O. minor, U. edulis and S. esculenta differed significantly among various ontogenetic stages (p < 0.05). The shapes of the lower beaks of U. edulis, S. esculenta and Sthenoteuthis oualaniensis were also significantly different among various ontogenetic stages (p < 0.05). The results of thin-plate spline deformation grids showed that the beaks of the four cephalopod species presented different variation patterns. This study gives us basic beak geometry morphology information for Octopus minor, Uroteuthis edulis, Sepia esculenta and Sthenoteuthis oualaniensis present in China’s coastal waters. The ontogenetic differences in beak shape might be related to extrinsic factors (diet difference and intra and interspecific competition) in habitat. Full article
(This article belongs to the Special Issue Assessment and Management of Cephalopod Fisheries and Ecosystems)
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