Growth-stimulating polypeptides for use in fish and crustaceans

15:

• A polypeptide comprising a polypeptidic chain having the sequence of amino acids identified in SEQ. ID. No. 7 or SEQ. ID. No. 8.

16:

• A method for stimulating growth in fish and crustaceans, said method comprising administering to said fish and crustaceans a polypeptide comprising a polypeptidic chain having the sequence of amino acids identified in SEQ. ID. No. 7 or SEQ. ID. No. 8.

17:

• A method for stimulating growth or resistance to diseases in fish or crustaceans, said method comprising administering to said fish and crustaceans feed formulations comprising Pichia pastoris culture supernatants comprising polypeptides at a dose of at least 4.8 mg polypeptide per Kg of feed, said polypeptides comprising a polypeptidic chain having the sequence of amino acids identified in SEQ. ID. No. 7 or SEQ. ID. No. 8.

18:

• A method according to claim 17, wherein said fish is an ornamental fish.

19:

• A method for stimulating growth, survival, and larvae quality for fish or crustaceans, said method comprising immersing said fish and crustaceans in water comprising Pichia pastoris culture supernatants comprising polypeptides present in a concentration between 0.05 and 0.5 mg of the polypeptide per liter of water, said polypeptides comprising a polypeptidic chain having the sequence of amino acids identified in SEQ. ID. No. 7 or SEQ. ID. No. 8.

20:

• A method for stimulating the humoral innate immune system of fish or crustaceans, said method comprising administering to said fish or crustaceans polypeptides comprising a polypeptidic chain having the sequence of amino acids identified in SEQ. ID. No. 7 or SEQ. ID. No. 8.