Please login first
Ecological characteristics of the reproduction of the nyroca duck (Aythya nyroca) breeding in lake Tonga (Northeast of Algeria)
* 1 , 2 , 2 , 3 , 3 , 3 , 3 , 4
1  Environmental Research Center, PO. Box: 2024, Sidi Amar Campus , 23005, Annaba, Algeria.
2  Environmental Research Center, Annaba, Algeria
3  Environmental Research Center
4  Guelma University, Algeria
Academic Editor: Humbert G. Díaz

Abstract:

The habitats and ecosystems of the Mediterranean Sea are of prime strategic interest both ecologically and economically. The Ferruginous duck, a species widely distributed in Africa, Europe and Asia, these numbers have experienced declines and changes in distribution in recent decades. The primary reasons for these declines are mainly due to habitat degradation and loss and hunting for local consumption (Robinson & Hughes 2003).

Our study was carried out on the Ferruginous Duck (Aythya nyroca) in Lake Tonga (El Kala National Park), during the period from September 2020 to August 2021. This duck classified as a near threatened species (IUCN, Red list 2022), a regular breeder in this body of water.

We observed the evolution of the numbers of this species during the wintering season, the maximum of 830 of which was noted during the month of December. This Anatidae also prefers to install its nests on islands of Typha angustifolia with a rate of 64%.

It appears that the date of the beginning of the laying is estimated towards the end of April, the nests contain on average 10 to 12 eggs with a maximum of 23 eggs. The monitoring of biometric parameters exposes us to very variable measurements, i.e., an external diameter of 25.8cm [18-35.5], an internal diameter of 16.46cm [12.5-22], a depth of 9.44cm [4.5-17], an elevation of the nests compared to the water around 11.75cm [4-20] and an average inter-nest distance of 5cm [1.75-22.84].

Keywords: Ferruginous duck; reproduction; nest support; Lake Tonga; ecology; phenology.
Comments on this paper
estefania Ascencio
Dear authors thank you for your support to the conference.

Now we closed the publication phase and launched the post-publication phase of the conference.
REVIEWWWERS'08 Brainstorming Workshop is Now Open from 2023-Jan-01 to 2023-Jan-31.
MOL2NET Committee, Authors, and Validated Social Media Followers Worldwide
Invited to Post Moderated Questions/Answers, Comments, about papers.
These are my Questions (Q) to you, please kindly post your public Answers (A) below
to promote scientific discussion and training of conference readers :


Q1. What are the policies or action plans to protect this species?
Q2. What are the consequences for the ecosystem of the extinction of this species?

Thank you for your kind support. Please make questions to other papers in different Mol2Net congresses
Commenting Steps: Login, Go to Papers List, Select Paper, Write Comment, Click Post Comment
Papers list: https://mol2net-08.sciforum.net/presentations/view
Workshop link: https://mol2net-08.sciforum.net/#reviewwwers
Souad Narsis
Hello Mr Estefanio
Souad Narsis
Hello Estefania,
R1: This Species is protected internationally by theses convetions:
- Convention on the Conservation of Migratory Species of Wild Animals (CMS - Bonn Convention): Appendix I
- Convention on the Conservation of Migratory Species of Wild Animals (CMS - Bonn Convention): Appendix II
- Convention on the Conservation of Migratory Species of Wild Animals (CMS - Bonn Convention): AEWA Agreement [1999]
- Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention): Appendix III
illegal hunting can represent a serious problem for its conservation, even though the hunting of this species is forbiden but it cannot be controlled all the time.

Souad Narsis
R2: Well, we dont have enough informations about the consequence on the ecosystem if this specific species disapears but generaly as said by Kesley Wooddell assistant director of the Earth Institute Center for Environmental Sustainability “When you lose one species, it affects the ecosystem and everything around it gets a little bit more fragile while it adapts to change,” “Even if it’s not a keystone species [a species that others in an ecosystem depend on], its loss will weaken the functionality of the entire ecosystem, which just makes it easier for that ecosystem to stop working.”



 
 
Top