Environmental assessment of the impact of cage fish farming on water quality and phytoplankton status in Monastir Bay (eastern coast of Tunisia)

Challouf, Rafika; Hamza, Asma; Mahfoudhi, Mabrouka; Ghozzi, Khémissa; Bradaï, Mohamed Nejmeddine

doi:10.1007/s10499-017-0187-1

Cited by 23 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study found no effects from current mariculture cage farm activities on the concentration of chlorophyll-a, as there were no significant differences in its levels between the cage and control stations. Similar observations for cage culture of gilthead seabream in particular and other marine species in general were obtained from studies in Turkey (Basaran et al, 2010), Tunisia (Challouf et al, 2017), Mauritius (Sadally et al, 2014) and Italy (Vezzulli et al, 2008).…”

Section: Discussionsupporting

confidence: 82%

“…Holmer (2010) reviewed more than 20 research papers on offshore mariculture cage farms, all of which revealed no significant effects on the water quality. In the case of a well-flushed marine site or offshore aquaculture facilities, the ecological effects could be insignificant, as currents ensure a high water exchange and more dispersion and dilution of wastes from cages (Campuzano et al, 2015), but for aquaculture facilities located inside embayment or fjords, the water quality could be affected by the aquaculture activities (Challouf et al, 2017). Price and Morris (2013) demonstrated that in the last twenty years, the significant improvement in the management practices of marine cage farms has led to reduced effects of fish farms on water quality.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatio-temporal variation of water quality variables and hydrography in a seabream cage culture farm off the coast of Oman

Al-Yahyai

Gallardo

Claereboudt

et al. 2020

Aquat. Living Resour.

View full text Add to dashboard Cite

Mariculture cage farming in Oman is in its infancy stage. This study provides important baseline information about the initial state of mariculture in Oman and for the sustainable management of future local cage farming. Our main objective was to evaluate the spatio-temporal variations of water quality and hydrography around a gilthead seabream (Sparus aurata) cage farm in Quriyat (Sea of Oman). Starting in July 2018, we conducted a monitoring program over one year in which physico-chemical variables and nutrient levels were regularly measured at the farm cages and at reference sites away from the farm. Vertical flow profiles were recorded at the farm and analysed together with remotely sensed data. The results showed no significant differences among physico-chemical variables and nutrient levels between cages and reference sites. However, there were clear seasonal as well as significant short-term variations in the measurements. Winter conditions are usually homogeneous over the water column without reaching extremes. In summer we recorded surface temperatures of up to 32 °C and extended periods of hypoxia below 35 m depth. Periods of pronounced stratification were interrupted by energetic irregular flow pulses that triggered short up or down-welling events which lead to strong variations of temperature and oxygen. We did not measure a significant impact of the cage farm on the local environment. Our results rather point to the particular importance of monitoring temperature and oxygen levels. Both variables can approach threshold levels for fish farming, especially during summer. We determined the relevant characteristics of the local system and defined requirements for adequate monitoring. The findings of this study provide a timely baseline for future research on the interactions between local cage farms and the marine ecosystem and will assist in the planning and management of mariculture in Oman.

show abstract

Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Spatio-temporal variation of water quality variables and hydrography in a seabream cage culture farm off the coast of Oman

Al-Yahyai

Gallardo

Claereboudt

et al. 2020

Aquat. Living Resour.

View full text Add to dashboard Cite

show abstract

“…The textile industry predominating, covering 79 % of the regional industrial fabric [19]. This region concentrates 12 % of Tunisia's industrial activity [7] and 44 % of the national fisheries production comes from fishering and aquaculture in the bay with four fishing harbours equipped with refrigeration complexes [11] -Figure 2. Geological context, described in the works of [23] and [31], is composed of Mio-Plio-Quaternary formations at the level of the Monastir cliff and Tyrrhéniennes formations (Ksibet Mediouni) at the level of the hills bordering the Bay.…”

Section: Methodsmentioning

confidence: 99%

Assessment of trace metal contamination and phosphorus dynamic in sediments of Monastir Bay (Tunisia)

Mefteh¹,

Mesnage

Jeddi³

et al. 2022

Ninth International Symposium “Monitoring of Mediterranean Coastal Areas: Problems and Measurement Techniques”

View full text Add to dashboard Cite

The Metallic Trace Elements were measured in the sediment, their concentrations highlighted a moderate pollution despite the human activities (urban-wastewater, harbour, textile industries). The phosphorus dynamic is controlled by environmental conditions, (i) oxic sediment with basic pH enhance the FeOOH formation then the phosphorus fixation on FeOOH or CaCO3 in sediment whatever the sediment lithology and (ii) anoxic and acidic sediment enhance the formation of ROP (Residual Organic Phosphorus) in correlation with the presence of aquatic plants (Posidonia meadow) in the sediment.

show abstract

“…In 2017, Monastir Bay contributed to 22.24% of total fish production in Tunisia, and is the first in terms of production in this country, hosting 1069 active boats, 35 of which are dedicated to aquaculture farms (GDFA, 2018). However, this biodiversity hotspot has been impacted by several industrial, fishing, and fish-farming activities (Nouira et al, 2013;Challouf et al, 2017;Damak et al, 2018). Additionally, Monastir Bay and its nearby areas are identified as risk zones for NIS introduction due to the presence of five fishing ports, eleven active offshore fish farms and a marina (Chebaane et al, 2019).…”

Section: Study Areamentioning

confidence: 99%

A Preliminary inventory of alien and cryptogenic species in Monastir Bay, Tunisia: spatial distribution, introduction trends and pathways

Chebaane

Sempere-Valverde

Dorai³

et al. 2019

Medit. Mar. Sci.

View full text Add to dashboard Cite

The Mediterranean Sea is a marine biodiversity hotspot under threat. One of the major impacts on its biological resources and services comes from the invasiveness of non-indigenous species (NIS). Nevertheless, NIS monitoring programs in the south basin of the Mediterranean Sea are in an early implementation stage. This study aims to describe NIS and cryptogenic species distribution in Monastir Bay (Tunisia) and to identify risk areas for the introduction and spread of invasive species, providing a baseline for future monitoring programs. To this end, a series of Rapid Assessment Surveys were carried out to identify NIS and cryptogenic species in one marina, five fishing ports, two aquaculture farms and the Special Conservation Area of the Kuriat islands. 24 species were found, of which 11 constitute new records for Monastir Bay, which represent a 33.3% of the total NIS reported in this Bay. Assemblages differed between substrata types, being NIS more abundant in artificial than in natural substrata. Regarding locations, Cap Monastir Marina was the most invaded site, the most transited by vessels and the only one visited by international sailing. Hence, this marina constitutes the main risk area to be monitored, although the fishing ports and fishing farms in the semi-enclosed coastal lagoon of Monastir Bay can also be considered as risk areas. Nevertheless, more research effort is needed in Monastir Bay in order to update the records of NIS and cryptogenic species and increase insight on the ecological evolution of these species and their related impacts on natural communities and marine resources.

show abstract

Environmental assessment of the impact of cage fish farming on water quality and phytoplankton status in Monastir Bay (eastern coast of Tunisia)

Cited by 23 publications

References 38 publications

Spatio-temporal variation of water quality variables and hydrography in a seabream cage culture farm off the coast of Oman

Spatio-temporal variation of water quality variables and hydrography in a seabream cage culture farm off the coast of Oman

Assessment of trace metal contamination and phosphorus dynamic in sediments of Monastir Bay (Tunisia)

A Preliminary inventory of alien and cryptogenic species in Monastir Bay, Tunisia: spatial distribution, introduction trends and pathways

Contact Info

Product

Resources

About