Aquatic Living Resources, Conservation and Oceanography in an Era of Change: Insights from the 4th International Congress on Applied Ichthyology, Oceanography & Aquatic Environment

Topic Information

Dear Colleagues,

To date, “HydroMediT” is being established as one of the major International congresses on novel scientific and technological trends and aspects on aquatic living resources in our region, covering the Mediterranean and its adjacent seas. The topic of the meeting, “Aquatic Living Resources, Conservation and Oceanography in an Era of Change”, highlights the importance of novel methods in the conservation and sustainable management of the biodiversity in the marine realm. Policy makers, industry players, scientists, and conservationists shall work together making a positive contribution to the sustainability of aquatic living resources in a changing world.

For more information about HydroMediT, please visit: https://hydromedit.gr/.

This Special Issue, “HydroMediT 2021: Applied Ichthyology, Oceanography and Aquatic Environment”, will focus on research and innovation technology applied mainly in the Mediterranean and its adjacent waters, but interesting topics from other parts of the world will also be accepted. General fields of interest will be the following:

• Oceanography
• Marine Diversity and Conservation
• Inland Aquatic Ecology and Resources
• Processing of Aquatic Products
• Environmental Management.

Dr. Georgios A. Gkafas
Prof. Drosos Koutsoubas
Dr. Stelios Katsanevakis
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Sustainability sustainability	3.3	6.8	2009	19.7 Days	CHF 2400
Conservation conservation	-	-	2021	35.6 Days	CHF 1000

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Published Papers (5 papers)

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Open AccessArticle

Developing a Blue Economy in Depok West Java, Indonesia: Opportunities and Challenges of Neon Tetra Fish Cultivation

by Harlis Setiyowati, Mulyanto Nugroho and Abdul Halik

Sustainability 2022, 14(20), 13028; https://doi.org/10.3390/su142013028 - 12 Oct 2022

Cited by 13 | Viewed by 4648

Abstract

Due to the prospective local and international markets, the neon tetra fish breeding industry has its own charm for fish lovers and as a side business. The purpose of this study is to analyze the opportunities and difficulties associated with the cultivation of [...] Read more.

Due to the prospective local and international markets, the neon tetra fish breeding industry has its own charm for fish lovers and as a side business. The purpose of this study is to analyze the opportunities and difficulties associated with the cultivation of neon tetra fish in order to build a policy of “Blue Economy”. The research method uses qualitative techniques, focusing on an evaluation of literature reviews and data collection techniques sourced from descriptive materials. The key elements selected were: (1) the Department of Food and Fisheries Security (DKP3), as the Board of Trustees (2) Researchers from BRIN (National Innovation Research Agency), (3) Government (Sub-districts and Kelurahan), (4) POKDAKAN (Fish Cultivation Group) and (5) LPM (Community Empowerment Institution) and Chairman of RW/RT. The conclusion of the study states that the relevant Dinas should support local policies based on nature identification that are strengthened at the national level, namely that routine human resource training needs to be improved, technology needs to be taken into account in collaboration with the private sector, and that post-harvest and market access are very important for POKDAKAN. The findings of the SWOT analysis, which is in quadrant 1, indicate that POKDAKAN is in a position for a somewhat aggressive expansion. Full article

(This article belongs to the Topic Aquatic Living Resources, Conservation and Oceanography in an Era of Change: Insights from the 4th International Congress on Applied Ichthyology, Oceanography & Aquatic Environment)

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15 pages, 2926 KiB  

Open AccessArticle

Proximate Composition, Predictive Analysis and Allometric Relationships, of the Edible Water Frog (Pelophylax epeiroticus) in Lake Pamvotida (Northwest Greece)

by Marianthi Hatziioannou, Efkarpia Kougiagka, Ioannis Karapanagiotidis and Dimitris Klaoudatos

Sustainability 2022, 14(6), 3150; https://doi.org/10.3390/su14063150 - 8 Mar 2022

Cited by 3 | Viewed by 2714

Abstract

The edible water frog Pelophylax epeiroticus, distributed mainly in Northwest Greece and utilized commercially as food, was investigated in lake Pamvotida (Ioannina). The objective was to assess aspects of population structure (sex ratio, morphometric characteristics, allometric relationships) and proximate composition of the Epirus [...] Read more.

The edible water frog Pelophylax epeiroticus, distributed mainly in Northwest Greece and utilized commercially as food, was investigated in lake Pamvotida (Ioannina). The objective was to assess aspects of population structure (sex ratio, morphometric characteristics, allometric relationships) and proximate composition of the Epirus water frog (Pelophylax epeiroticus). Commercial samples (31 females and 54 males) were obtained and sex ratio, morphometric characteristics, allometric relationships and proximate composition were assessed. A significantly lower abundance of females was indicated (31 females and 54 males). Body length range was higher in females (females 3.4 mm, males 2.6 mm), whereas total weight range was higher in males (females 45.08 gr, males 48.35 gr). Differences in allometric relationships were indicated between sexes. The high protein (15.93 ± 3.32) and low lipid (0.25 ± 0.13) contents indicated that P. epeiroticus is an excellent food source of high nutritional value. A tree classification algorithm indicated that the principal contributing component for sex classification was dry matter, followed by a proportion of edible flesh and protein content. A predicted future increase in demand for wild-caught individuals requires the use of a suitable management plan, coupled with the development of farming practices aiming to assure the sustainable exploitation of this important resource and alleviate the pressure on its populations. Full article

(This article belongs to the Topic Aquatic Living Resources, Conservation and Oceanography in an Era of Change: Insights from the 4th International Congress on Applied Ichthyology, Oceanography & Aquatic Environment)

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25 pages, 3115 KiB  

Open AccessArticle

Temporal and Spatial Analysis of Coastal Water Quality to Support Application of Whiteleg Shrimp Litopenaeus vannamei Intensive Pond Technology

by Akhmad Mustafa, Mudian Paena, Admi Athirah, Erna Ratnawati, Ruzkiah Asaf, Hidayat Suryanto Suwoyo, Sahabuddin Sahabuddin, Erfan Andi Hendrajat, Kamaruddin Kamaruddin, Early Septiningsih, Andi Sahrijanna, Ismail Marzuki and Khairun Nisaa

Sustainability 2022, 14(5), 2659; https://doi.org/10.3390/su14052659 - 24 Feb 2022

Cited by 16 | Viewed by 4291

Abstract

The study aimed to determine the performance of whiteleg shrimp culture in relation to temporal and spatial aspects and characteristics and water quality status. Measurement and sampling of water were carried out before stocking/initial stocking of culture whiteleg shrimp (rainy season) and end [...] Read more.

The study aimed to determine the performance of whiteleg shrimp culture in relation to temporal and spatial aspects and characteristics and water quality status. Measurement and sampling of water were carried out before stocking/initial stocking of culture whiteleg shrimp (rainy season) and end of culture/after harvesting of whiteleg shrimp (dry season) at two locations in the coastal area of Bulukumba Regency, namely Bonto Bahari Subdistrict (BB) and Gantarang Subdistrict (GT), and one location as a control, namely in the coastal area of Ujung Loe Subdistrict. Variables measured and analyzed included temperature, salinity, pH, dissolved oxygen, nitrate, nitrite, ammonia, phosphate, total suspended solids, and total organic matter. Data were analyzed by descriptive statistics, multivariate statistics, and non-parametric statistics. Water quality status was determined using the Storet (Storage and Retrieval) method. The results showed that the culture of whiteleg shrimp was technology intensive with a stocking density of 110–220 ind/m² with productivity between 13.9 and 44.4 tons/ha/cycle. The predicted waste load of N is 28.00 tons/cycle and P reaches 6.61 tons/cycle. Another result was that changes in water quality status during the rainy season were classified as moderately polluted at the BB location and complying with quality standards at the GT location. In the dry season, both locations were categorized as heavily polluted. Variables of water quality that caused the decrease in water quality status in both locations (BB and GT) were observed to increase salinity, nitrate concentration, and ammonia concentration and decreased dissolved oxygen concentration in the dry season. It is recommended to carry out proper feed management, use of probiotics, and increase the capacity and capability of wastewater treatment plants to reduce ammonia and nitrate concentrations in water in coastal areas. It is necessary to determine a more precise time for whiteleg shrimp stocking by reducing the possibility that whiteleg shrimp culture will still occur at the dry season’s peak. Full article

(This article belongs to the Topic Aquatic Living Resources, Conservation and Oceanography in an Era of Change: Insights from the 4th International Congress on Applied Ichthyology, Oceanography & Aquatic Environment)

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12 pages, 828 KiB  

Open AccessEditor’s ChoiceArticle

First Report of the Parasitic Nematode Pseudoterranova spp. Found in Mediterranean Monk Seal (Monachus monachus) in Greece: Conservation Implications

by Efstathia Koitsanou, Joanne Sarantopoulou, Anastasia Komnenou, Athanasios Exadactylos, Panagiotis Dendrinos, Elias Papadopoulos and Georgios A. Gkafas

Conservation 2022, 2(1), 122-133; https://doi.org/10.3390/conservation2010010 - 23 Feb 2022

Cited by 2 | Viewed by 4243

Abstract

The Mediterranean monk seal (Monachus monachus) is classified as an endangered species by the IUCN, with a global population that does not exceed 800 individuals. There is limited understanding around the biology and health status of the species, rendering possible parasitic infections [...] Read more.

The Mediterranean monk seal (Monachus monachus) is classified as an endangered species by the IUCN, with a global population that does not exceed 800 individuals. There is limited understanding around the biology and health status of the species, rendering possible parasitic infections grave for its conservation efforts. The aim of the current study was the molecular identification of a parasitic nematode found in the digestive system of a sub-adult Mediterranean monk seal individual, that was found stranded in the area of Pagasitikos Gulf, Greece in 2019. Analysis of the stomach contents revealed the presence of two intact female nematode individuals. Standard protocols were followed as DNA extraction of the parasites was conducted and PCR amplification of the cytochrome oxidase subunit I (COI) mitochondrial gene was implemented. Sequencing analysis of a 585 bp-amplified product displayed a 96% similarity of the screened nematodes to the Pseudoterranova bulbosa species. Bayesian inference was implemented for the subsequent tree reconstruction. The phylogenetic tree revealed a clear genetic similarity between our parasitic nematode individuals named as Pseudoterranova spp. and Pseudoterranova bulbosa (bootstrap value: 82%), which is indicated for the first and only time as such, to be found in the waters of the Mediterranean Sea and also in the stomach of a Mediterranean monk seal. Full article

(This article belongs to the Topic Aquatic Living Resources, Conservation and Oceanography in an Era of Change: Insights from the 4th International Congress on Applied Ichthyology, Oceanography & Aquatic Environment)

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17 pages, 2845 KiB  

Open AccessArticle

Food and Feeding Biology of Nile Tilapia (Oreochromis niloticus) in Lake Langeno, Ethiopia

by Mathewos Temesgen, Abebe Getahun, Brook Lemma and Geert P. J. Janssens

Sustainability 2022, 14(2), 974; https://doi.org/10.3390/su14020974 - 15 Jan 2022

Cited by 20 | Viewed by 8404

Abstract

This study aimed to investigate the natural feeding behavior of Nile tilapia in Lake Langeno, Ethiopia, with emphasis on potential spatial, size and seasonal effects on ingested food items. This study of the food and feeding biology of O. niloticus in Lake Langeno, [...] Read more.

This study aimed to investigate the natural feeding behavior of Nile tilapia in Lake Langeno, Ethiopia, with emphasis on potential spatial, size and seasonal effects on ingested food items. This study of the food and feeding biology of O. niloticus in Lake Langeno, Ethiopia, was conducted from March 2016to February 2017. Fish samples were collected monthly from six different sampling sites using different mesh sizes of gillnets. A total of 610 fish specimens with full stomachs were considered for the assessment of feeding biology. In total, seven food items, namely phytoplankton, zooplankton, insects, detritus, macrophytes, fish parts and nematodes, were identified from the fish stomach contents. Phytoplankton was the most commonly consumed food prey, followed by detritus, zooplankton and macrophytes. The other food items were occasionally and randomly consumed. Phytoplankton and detritus were the dominant food prey in the dry season, with zooplankton and macrophytes the main prey during the wet months. The contribution of phytoplankton, zooplankton and insects were slightly highest in small-sized groups (<10 cm), whereas detritus, macrophytes and fish parts were highest in larger-size groups (>20 cm) (p < 0.05). The present results point to a concurrence of the relative importance of dietary items at the individual level, species level and among the study sites. Phytoplankton was the primary consumed food item, which indicates the specialist feeding strategy of Nile tilapia in the lake. Generally, food items of plant origin, typically associated with less protein content than animal origin food items, dominated the stomach contents of Nile tilapia. The dietary pattern of Nile tilapia in Lake Langeno shifts with size and season, aspects that might warrant further study in view of aquaculture applications as well as climate change. Full article

(This article belongs to the Topic Aquatic Living Resources, Conservation and Oceanography in an Era of Change: Insights from the 4th International Congress on Applied Ichthyology, Oceanography & Aquatic Environment)

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